docs: update wiki pages to match current codebase state
docs: update wiki for normalized provider IDs and image metadata (#375) Architecture: add artist_provider_ids and artist_images to ERD and table descriptions, add ImageRepository to repository pattern table, remove stale musicbrainz_id from artists entity. Developer Guide: add ImageRepository to interface list. Contributing: add ImageRepository to mock interfaces list. Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
docs: update wiki for normalized schema and repository pattern (#375) Architecture: add Schema section with ERD, table descriptions, repository pattern, and shared database helpers. Developer Guide: add internal/dbutil/ package, repository pattern and shared helpers design principles. Contributing: add repository mocks testing guidance. Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
docs: add Developer Guide, Architecture, and Contributing wiki pages Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>