Fix failing integration tests (repo deploy, startup deploy, Docker build)

[miantalha45]

Summary

Fixes the integration test failures and Docker build issues reported in review.

Changes

Backend

• src/controller/repository.ts: Normalize repository-derived names to lowercase so lookup matches regardless of URL casing.

Tests

• test/test.sh:
  • Retry when fetching deployment prefix after repo deploy (up to 10×, 2s apart) to handle FaaS registration delay.
  • Increase readiness MAX_RETRIES from 5 to 30 so startup-deploy test has enough time for FaaS to load prior deployments.

Build / tooling

• Dockerfile: Use FROM --platform=linux/amd64 so the image builds on Apple Silicon (aarch64), where the MetaCall installer is not supported and the Docker fallback is unavailable during build.
• package.json / src/test/test.ts: ESLint and TypeScript fixes for the test file so lint and build pass.

Testing

• Integration tests pass locally (including repo deploy and TEST_FAAS_STARTUP_DEPLOY=true).
• Docker build succeeds on non-amd64 hosts.