Fix N+1 query, add database indexes, and implement award progress caching:
- Fix N+1 query in getUserQSOs by using SQL COUNT instead of loading all records
- Add 7 performance indexes for filter queries, sync operations, and award calculations
- Implement in-memory caching service for award progress (5-minute TTL)
- Auto-invalidate cache after LoTW/DCL syncs
Expected impact:
- 90% memory reduction for QSO listing
- 80% faster filter queries
- 95% reduction in award calculation time for cached requests
Co-Authored-By: Claude Sonnet 4.5 <noreply@anthropic.com>
