Fix histogram data point value extraction in normalizer — OTLP histogram
points carry sum/count instead of asDouble/asInt, so needle.bead.duration
was silently dropped. Add MetricAccumulator tests and end-to-end tests
validating OTLP metrics flow through to session_worker_summaries in
fabric.db with otlp-metric source preference.
Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>
Comprehensive worker performance metrics tracking system:
Features:
- Beads per hour calculation
- Average completion time tracking
- Error rate monitoring
- Cost per bead calculation (USD)
- Idle percentage tracking
- Time-series data storage and retrieval
- Performance trend analysis
- Aggregated analytics across all workers
Implementation:
- Added WorkerAnalytics types to types.ts
- Created workerAnalytics.ts module with full aggregation logic
- Integrated with EventStore for automatic event processing
- 25 comprehensive unit tests (all passing)
- Exported from index.ts for public API access
Technical highlights:
- Automatic activity period detection with 5-minute gap threshold
- Time-series snapshots at configurable intervals (default 1 hour)
- Flexible time window filtering (hour/day/week/all)
- Worker ranking by performance, error rate, and cost efficiency
- Performance trend detection (improving/declining/stable)
Co-Authored-By: Claude Worker <noreply@anthropic.com>
