Implement Diagnostic Fault Library with basic DFM, SOVD interface, and CI infrastructure

.bazelrc

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+build --java_language_version=17
+build --tool_java_language_version=17
+build --java_runtime_version=remotejdk_17
+build --tool_java_runtime_version=remotejdk_17
+build --@score-baselibs//score/json:base_library=nlohmann
+build --@score-baselibs//score/mw/log/flags:KRemote_Logging=False
+
+test --test_output=errors
+
+common --registry=https://raw.githubusercontent.com/eclipse-score/bazel_registry/main/
+common --registry=https://bcr.bazel.build
+
+# allow empty globs for docs
+build --noincompatible_disallow_empty_glob

.bazelversion

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+8.3.0

.github/PULL_REQUEST_TEMPLATE/bug_fix.md

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+# Bugfix
+
+> [!IMPORTANT]
+> Use this template only for bugfixes that do not influence topics covered by contribution requests or improvements.
+
+> [!CAUTION]
+> Make sure to submit your pull-request as **Draft** until you are ready to have it reviewed by the Committers.
+
+## Description
+
+[A short description of the bug being fixed by the contribution.]
+
+## Related ticket
+
+> [!IMPORTANT]
+> Please replace `[ISSUE-NUMBER]` with the issue-number that tracks this bug fix. If there is no such
+> ticket yet, create one via [this issue template](../ISSUE_TEMPLATE/new?template=bug_fix.md).
+
+closes [ISSUE-NUMBER] (bugfix ticket)

.github/PULL_REQUEST_TEMPLATE/improvement.md

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+# Improvement
+
+> [!IMPORTANT]
+> Use this template only for improvement that do not influence topics covered by contribution requests or bug fixes.
+
+> [!CAUTION]
+> Make sure to submit your pull-request as **Draft** until you are ready to have it reviewed by the Committers.
+
+## Description
+
+[A short description of the improvement being addressed by the contribution.]
+
+## Related ticket
+
+> [!IMPORTANT]
+> Please replace `[ISSUE-NUMBER]` with the issue-number that tracks this bug fix. If there is no such
+> ticket yet, create one via [this issue template](../ISSUE_TEMPLATE/new?template=improvement.md).
+
+closes [ISSUE-NUMBER] (improvement ticket)

.github/workflows/audit.yml

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+# *******************************************************************************
+# Copyright (c) 2026 Contributors to the Eclipse Foundation
+#
+# See the NOTICE file(s) distributed with this work for additional
+# information regarding copyright ownership.
+#
+# This program and the accompanying materials are made available under the
+# terms of the Apache License Version 2.0 which is available at
+# https://www.apache.org/licenses/LICENSE-2.0
+#
+# SPDX-License-Identifier: Apache-2.0
+# *******************************************************************************
+
+name: Security Audit
+
+on:
+  pull_request:
+    branches: [main]
+  push:
+    branches: [main]
+  merge_group:
+    types: [checks_requested]
+  schedule:
+    # Run weekly on Monday at 06:00 UTC to catch newly disclosed advisories
+    - cron: "0 6 * * 1"
+
+permissions:
+  contents: read
+
+concurrency:
+  group: ${{ github.workflow }}-${{ github.ref }}
+  cancel-in-progress: true
+
+jobs:
+  cargo-audit:
+    name: Cargo Audit
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v4
+
+      - name: Install cargo-audit
+        uses: taiki-e/install-action@23db74cab27cd77071e076a00b569de9549cf0dd # v2.48.8
+        with:
+          tool: cargo-audit@0.22.1
+
+      - name: Run cargo audit
+        run: cargo audit

.github/workflows/build_test.yml

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+# *******************************************************************************
+# Copyright (c) 2026 Contributors to the Eclipse Foundation
+#
+# See the NOTICE file(s) distributed with this work for additional
+# information regarding copyright ownership.
+#
+# This program and the accompanying materials are made available under the
+# terms of the Apache License Version 2.0 which is available at
+# https://www.apache.org/licenses/LICENSE-2.0
+#
+# SPDX-License-Identifier: Apache-2.0
+# *******************************************************************************
+
+name: Build & Test
+
+on:
+  pull_request:
+    branches: [main]
+  push:
+    branches: [main]
+  merge_group:
+    types: [checks_requested]
+
+permissions:
+  contents: read
+
+concurrency:
+  group: ${{ github.workflow }}-${{ github.ref }}
+  cancel-in-progress: true
+
+jobs:
+  cargo-build-test:
+    name: Cargo Build & Test
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v4
+
+      - name: Install Rust toolchain
+        uses: actions-rust-lang/setup-rust-toolchain@v1
+
+      - name: Build all crates
+        run: cargo build --workspace
+
+      - name: Run tests (IPC tests run serially)
+        run: cargo test --workspace --all-targets
+
+  bazel-build-test:
+    name: Bazel Build & Test
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v4
+
+      - name: Setup Bazel
+        uses: bazel-contrib/setup-bazel@0.14.0
+        with:
+          bazelisk-cache: true
+          disk-cache: ${{ github.workflow }}-bazel
+          repository-cache: true
+
+      - name: Bazel build (excluding docs — score_plantuml requires local runfiles)
+        run: bazel build //src/... //tests/...
+
+      - name: Bazel test (excluding docs)
+        run: bazel test //src/... //tests/...

.github/workflows/copyright.yml

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+# *******************************************************************************
+# Copyright (c) 2026 Contributors to the Eclipse Foundation
+#
+# See the NOTICE file(s) distributed with this work for additional
+# information regarding copyright ownership.
+#
+# This program and the accompanying materials are made available under the
+# terms of the Apache License Version 2.0 which is available at
+# https://www.apache.org/licenses/LICENSE-2.0
+#
+# SPDX-License-Identifier: Apache-2.0
+# *******************************************************************************
+
+name: Copyright Check
+
+on:
+  pull_request:
+    branches: [main]
+  push:
+    branches: [main]
+  merge_group:
+    types: [checks_requested]
+
+permissions:
+  contents: read
+
+concurrency:
+  group: ${{ github.workflow }}-${{ github.ref }}
+  cancel-in-progress: true
+
+jobs:
+  copyright:
+    name: Copyright Header Validation
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v4
+
+      - name: Setup Bazel
+        uses: bazel-contrib/setup-bazel@0.14.0
+        with:
+          bazelisk-cache: true
+          disk-cache: ${{ github.workflow }}-bazel
+          repository-cache: true
+
+      - name: Check copyright headers
+        run: bazel run //:copyright.check

.github/workflows/coverage.yml

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+# *******************************************************************************
+# Copyright (c) 2026 Contributors to the Eclipse Foundation
+#
+# See the NOTICE file(s) distributed with this work for additional
+# information regarding copyright ownership.
+#
+# This program and the accompanying materials are made available under the
+# terms of the Apache License Version 2.0 which is available at
+# https://www.apache.org/licenses/LICENSE-2.0
+#
+# SPDX-License-Identifier: Apache-2.0
+# *******************************************************************************
+
+name: Coverage
+
+on:
+  pull_request:
+    branches: [main]
+  push:
+    branches: [main]
+  merge_group:
+    types: [checks_requested]
+
+permissions:
+  contents: read
+
+concurrency:
+  group: ${{ github.workflow }}-${{ github.ref }}
+  cancel-in-progress: true
+
+env:
+  COVERAGE_THRESHOLD: 90
+
+jobs:
+  coverage:
+    name: Code Coverage
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v4
+
+      - name: Install Rust toolchain
+        uses: actions-rust-lang/setup-rust-toolchain@v1
+        with:
+          components: llvm-tools-preview
+
+      - name: Install cargo-llvm-cov
+        uses: taiki-e/install-action@cargo-llvm-cov
+
+      - name: Generate coverage (LCOV)
+        run: cargo llvm-cov --workspace --exclude xtask --ignore-filename-regex 'test_utils|dfm_test_utils' --lcov --output-path lcov.info
+
+      - name: Generate coverage summary
+        id: coverage
+        run: |
+          # Extract total line coverage percentage from cargo-llvm-cov text output
+          REPORT=$(cargo llvm-cov --workspace --exclude xtask --ignore-filename-regex 'test_utils|dfm_test_utils' --no-run 2>&1)
+          echo "$REPORT"
+
+          # Parse the TOTAL line for line coverage
+          TOTAL_LINE_COV=$(echo "$REPORT" | grep '^TOTAL' | awk '{print $(NF-3)}' | tr -d '%')
+          echo "total_coverage=$TOTAL_LINE_COV" >> "$GITHUB_OUTPUT"
+          echo "### Coverage Report" >> "$GITHUB_STEP_SUMMARY"
+          echo "" >> "$GITHUB_STEP_SUMMARY"
+          echo "**Total line coverage: ${TOTAL_LINE_COV}%**" >> "$GITHUB_STEP_SUMMARY"
+          echo "" >> "$GITHUB_STEP_SUMMARY"
+          echo '```' >> "$GITHUB_STEP_SUMMARY"
+          echo "$REPORT" >> "$GITHUB_STEP_SUMMARY"
+          echo '```' >> "$GITHUB_STEP_SUMMARY"
+
+      - name: Upload coverage artifact
+        uses: actions/upload-artifact@v4
+        with:
+          name: coverage-lcov
+          path: lcov.info
+          retention-days: 30
+
+      - name: Enforce coverage threshold
+        run: |
+          COVERAGE="${{ steps.coverage.outputs.total_coverage }}"
+          THRESHOLD="${{ env.COVERAGE_THRESHOLD }}"
+          echo "Coverage: ${COVERAGE}%, Threshold: ${THRESHOLD}%"
+          if (( $(echo "$COVERAGE < $THRESHOLD" | bc -l) )); then
+            echo "::error::Coverage ${COVERAGE}% is below threshold ${THRESHOLD}%"
+            exit 1
+          fi
+          echo "Coverage ${COVERAGE}% meets threshold ${THRESHOLD}%"

.github/workflows/format.yml

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+# *******************************************************************************
+# Copyright (c) 2026 Contributors to the Eclipse Foundation
+#
+# See the NOTICE file(s) distributed with this work for additional
+# information regarding copyright ownership.
+#
+# This program and the accompanying materials are made available under the
+# terms of the Apache License Version 2.0 which is available at
+# https://www.apache.org/licenses/LICENSE-2.0
+#
+# SPDX-License-Identifier: Apache-2.0
+# *******************************************************************************
+
+name: Format Check
+
+on:
+  pull_request:
+    branches: [main]
+  push:
+    branches: [main]
+  merge_group:
+    types: [checks_requested]
+
+permissions:
+  contents: read
+
+concurrency:
+  group: ${{ github.workflow }}-${{ github.ref }}
+  cancel-in-progress: true
+
+jobs:
+  rustfmt:
+    name: Rust Format (rustfmt)
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v4
+
+      - name: Install Rust toolchain
+        uses: actions-rust-lang/setup-rust-toolchain@v1
+        with:
+          components: rustfmt
+
+      - name: Check formatting
+        run: cargo fmt --all -- --check
+
+  bazel-format:
+    name: Bazel Format Check
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v4
+
+      - name: Setup Bazel
+        uses: bazel-contrib/setup-bazel@0.14.0
+        with:
+          bazelisk-cache: true
+          disk-cache: ${{ github.workflow }}-bazel
+          repository-cache: true
+
+      - name: Check Bazel formatting
+        run: bazel test //:format.check