- Add backfillAggregatesChunk mutation that processes 500 records at a time
- Uses pagination and ctx.scheduler.runAfter to chain batch processing
- Prevents Convex 16MB memory limit issues with large datasets
- Progress visible in Convex dashboard logs
- Track seen session IDs across chunks for unique visitor counting
- Update howstatsworks.md with chunked backfilling documentation
- Add v1.11.1 changelog entries
- Add @convex-dev/aggregate package for efficient aggregation
- Update convex.config.ts with pageViewsByPath, totalPageViews, uniqueVisitors aggregates
- Update recordPageView to insert into aggregate components
- Update getStats to use aggregate counts instead of O(n) table scans
- Add backfillAggregates internal mutation for existing data
- Update prds/howstatsworks.md with old vs new comparison
- Update changelog.md with v1.11.0 entry
- Update files.md with aggregate component info
- Add 10-second dedup window to heartbeat mutation for idempotency
- Add frontend debouncing (5s) with refs to prevent duplicate calls
- Track pending heartbeat state to block overlapping async calls
- Early return when session already updated with same path
Backend (convex/stats.ts):
- Add HEARTBEAT_DEDUP_MS constant (10 seconds)
- Check if session was recently updated before patching
Frontend (src/hooks/usePageTracking.ts):
- Add isHeartbeatPending, lastHeartbeatTime, lastHeartbeatPath refs
- Wrap sendHeartbeat in useCallback with debounce logic
- Import useCallback from React
Fixes write conflict retries shown in Convex dashboard for stats:heartbeat
