- Rename checkFlapping to checkFlappingLocked to clarify lock contract
- Replace goto statements with structured control flow
- Wire up unused recordAlertFired/recordAlertResolved metric hooks
- Add trackingMapCleanup goroutine to prevent memory leaks from stale entries
- Tighten alert ID validation to alphanumeric + safe punctuation
- Fix history save error handling to properly manage backup lifecycle
- Add auto-migration for deprecated GroupingWindow field
- Refactor 300+ line UpdateConfig into focused helper functions
- Unify duplicate evaluateVMCondition/evaluateContainerCondition
- Add constants for magic numbers (thresholds, timing, flapping)
- Update tests to match new backup behavior
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