fix: handle Pydantic dict format in YAML numeric parser (GH#1235)

[sunt05]

Summary

• Fix parse_numeric_sequence() in yaml_config.rs to handle Pydantic's named-key dict serialisation of hdd_id (e.g. {hdd_accum: 13.5, cdd_accum: 13.5, ...}), which was silently falling back to all-zero values
• Regenerate sample_output.csv.gz with correct hdd_id values

Root cause

The Rust YAML parser only recognised the {value: [...]} wrapper for Mapping values. When the Python backend serialises config via Pydantic model_dump(), hdd_id becomes a named-key dict. The parser returned None, triggering a silent fallback to [0.0, ...] for heating/cooling degree-day accumulators. This affected anthropogenic heat flux (QF) and cascading variables.

The bug was introduced in #1209 (Rust bridge) but only became visible when #1116 regenerated the sample reference through the buggy path.

Verification

• Pre-Vitor commit (77e861e37): applied parser fix only, both test_rust_backend_via_simulation and test_rust_bridge_sample_output pass against the known-good pre-Compute c2m/c2h dynamically from HF08 RSL theory #1116 reference
• Current master + fix: both tests pass after reference regeneration
• make test-smoke: 15 passed, 2 skipped

Test plan

• CI passes test_rust_backend_via_simulation
• Local test_rust_bridge_sample_output passes (CI skips — binary not at expected path)
• make test-smoke passes

Fixes #1235

🤖 Generated with Claude Code

[github-actions]

CI Build Plan

Changed Files

Rust bridge (1 file)

• src/suews_bridge/src/yaml_config.rs

Tests (2 files)

• test/core/test_sample_output.py
• test/fixtures/data_test/sample_output.csv.gz

Build Configuration

	Configuration
Platforms	Linux x86_64, macOS ARM64, Windows x64
Python	3.9, 3.14
Test tier	standard (all except slow)
UMEP build	Yes (compiled extension may differ)
PR status	Ready (standard matrix)

Rationale

• Rust bridge changed -> multiplatform build required
• Test files changed -> validation build
• Compiled extension ABI may differ -> UMEP (NumPy 1.x) build included

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