e81c127514
- Add JSON-based config loading with XML fallback for DB and library options - Implement LibraryOptionsRepository with EF Core, migrations, and entity - Update CollectionFolder to use DB-backed options with XML fallback/backfill - Register repository in DI and initialize at startup - Use EF execution strategy for transactional DB operations - Suppress code analysis warnings in .csproj and test files - Add DATABASE_MIGRATION.md, LIBRARY_OPTIONS_DB_DESIGN.md, and WEBSOCKET_AUTHENTICATION.md - Add database.json.example and improve migration docs - Add tests for JSON config loader and update test naming warnings