Fix GitHub Actions build by adding missing repository files

The build was failing because repository files were ignored by .gitignore:
- backend/src/features/*/data/*.repository.ts files were excluded by 'data/' pattern
- These files exist locally but were missing in CI, causing TS2307 module errors
- Controllers and services import these repositories, causing cascade failures

Changes:
- Updated .gitignore to allow TypeScript files in feature data directories
- Added fuel-logs.repository.ts, stations.repository.ts, vehicles.repository.ts
- Docker build now succeeds (tested with --no-cache)

🤖 Generated with [Claude Code](https://claude.ai/code)

Co-Authored-By: Claude <noreply@anthropic.com>

.gitignore

@@ -14,5 +14,6 @@ coverage/
 bin/
 obj/
 data/
+!backend/src/features/*/data/*.ts
 MotoVaultPro.csproj.user
 Properties/launchSettings.json