- Implement cleanupDeletedFiles to remove orphaned database records for files no longer on disk
- Add verifyAndRegenerateThumbnail to detect and regenerate missing thumbnails for existing media
- Integrate new cleanup and verification steps into main scanLibrary async function
- Update scan stats to track files removed and thumbnails regenerated
- Enhance error handling to log but not block overall scan progress
- Maintain existing file discovery and processing workflows with new verification layers
- Provide detailed scanning process flow and statistics tracking for improved observability
- Add four new docs covering requirements, architecture, implementation plan, and summary
- Update FEATURE_STATUS.md with detailed library scan enhancement feature list and planning status
- Include new section in README.md outlining enhanced scan features and documentation links
- Update library cluster docs count from 12 to 16 to reflect new documents
- Mark library scan enhancement as critical priority and planning complete in status files
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