* feat(monitoring): implement hierarchical monitoring for Author/Series/Book/Audiobook
- Add cascade logic: unmonitoring parent cascades to children
- Re-monitoring parent does not auto-monitor children (explicit control)
- EffectivelyMonitored computed from item AND all ancestors
- Database indexes for efficient cascade queries (migration 248)
- AuthorMonitoringChangedEvent and SeriesMonitoringChangedEvent
- EffectivelyMonitored field added to Book/Audiobook API resources
Closes#2🤖 Generated with [Claude Code](https://claude.com/claude-code)
Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>
* refactor(monitoring): reduce code duplication in HierarchicalMonitoringService
- Extract common ancestor check to IsAncestorUnmonitored helper
- Consolidate monitoring context retrieval to GetMonitoringContext
- Create generic UnmonitorEntities helper for cascade operations
- Reduce code from 302 to 233 lines while preserving all functionality
* ci(sonar): exclude intentional structural duplication from CPD
* ci(codeql): exclude user-controlled-bypass for monitoring cascade logic
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Co-authored-by: admin <admin@ardentleatherworks.com>
Co-authored-by: Claude Opus 4.5 <noreply@anthropic.com>
