Add DLQ, auto-purge, and health checks for Redis queues#688
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- Implement dead-letter queue (DLQ) to capture failed VM operations - Implement auto-purge to clean up stale queue entries - Implement health checks to monitor queue health - Add comprehensive tests and documentation Features: - DLQ captures failures from pending, clone, and ready queues - Auto-purge removes stale VMs with configurable thresholds - Health checks expose metrics for monitoring and alerting - All features opt-in via configuration (backward compatible)
- Add skip_metrics parameter to move_to_dlq to avoid double-counting when called from purge - Fix purge_pending_queue to only increment count when not in dry-run mode - Add nil check for config redis before accessing data_ttl - Update health check tests to allow all gauge calls before checking specific metrics - Reorder push_health_metrics to emit error/queue/task metrics before status All 851 tests now pass including 40 queue reliability tests.
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mahikalra
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Dec 24, 2025
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