[codex] Add movie catalog images and listing

[marciomyst]

Summary

• Adds movie external image metadata to the create movie flow and persists normalized card image paths.
• Normalizes movie genres into reusable genre records and maps movie-genre associations.
• Adds GET /api/movies with pagination, title search, and paged movie summary contracts for the Angular catalog.
• Updates the catalog card to resolve TMDB poster paths through https://image.tmdb.org/t/p/w342.
• Adds focused backend/frontend tests and updates related API/domain/testing/spec documentation.

Why

The Angular catalog was calling GET /api/movies?page=1&pageSize=12, but the backend only exposed POST /api/movies, so the request returned 404. Catalog cards also needed to render TMDB poster paths as absolute image URLs.

Validation

• dotnet test SmartMovieCatalog.slnx -c Release - 142 tests passed, 1 warning reported by the build.
• npm test -- --watch=false - 31 tests passed.
• npm run build - passed.

[sonarqubecloud]

Quality Gate passed

Issues
11 New issues
0 Accepted issues

Measures
0 Security Hotspots
85.5% Coverage on New Code
0.0% Duplication on New Code

See analysis details on SonarQube Cloud