2 commits

Author	SHA1	Message	Date
rcourtman	160adeb3b8	feat: add scheduler health API endpoint (Phase 2 Task 8) ... Task 8 of 10 complete. Exposes read-only scheduler health data including: - Queue depth and distribution by instance type - Dead-letter queue inspection (top 25 tasks with error details) - Circuit breaker states (instance-level) - Staleness scores per instance New API endpoint: GET /api/monitoring/scheduler/health (requires authentication) New snapshot methods: - StalenessTracker.Snapshot() - exports all staleness data - TaskQueue.Snapshot() - queue depth & per-type distribution - TaskQueue.PeekAll() - dead-letter task inspection - circuitBreaker.State() - exports state, failures, retryAt - Monitor.SchedulerHealth() - aggregates all health data Documentation updated with API spec, field descriptions, and usage examples.	2025-10-20 15:13:38 +00:00
rcourtman	b1f445b33d	feat: implement error handling with circuit breakers and backoff (Phase 2 Task 7) ... Adds comprehensive error resilience: - Circuit breaker with closed/open/half-open states (3 failures = trip) - Exponential backoff with jitter (2s initial, 2x multiplier, 5min max) - Dead-letter queue for tasks exceeding 5 retry attempts - Error classification (transient vs permanent) using internal/errors helpers - Per-instance failure tracking and breaker state management - Integration with staleness tracker for outcome recording Task 7 of 10 complete (70%). Ready for API surfaces and testing.	2025-10-20 15:13:37 +00:00