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

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ADAPTIVE_POLLING.md

feat: add scheduler health API endpoint (Phase 2 Task 8)

2025-10-20 15:13:38 +00:00