fix: recover bgp anomaly and incident generation

docs/CHANGELOG.md

@@ -7,6 +7,30 @@ This project follows the repository versioning rule:
 - `feature` -> `+0.1.0`
 - `bugfix` -> `+0.0.1`
 
+## 0.22.5
+
+Released: 2026-03-31
+
+### Highlights
+
+- Relaxed the BGP anomaly pipeline so realtime observation batches can produce visible anomaly and incident signals more consistently instead of staying observation-only.
+- Added incident backfill-on-detection behavior so Earth and the BGP console can recover incident objects even when matching anomaly rows already existed from earlier ingests.
+- Tightened BGP detector test coverage around low-signal withdrawal bursts, origin conflicts without historic baseline, and anomaly-to-incident regeneration.
+
+### Improved
+
+- Improved [bgp_detectors.py](/home/ray/dev/linkong/planet/backend/app/services/bgp_detectors.py) by broadening origin-change detection into a multi-origin conflict path when multiple collectors observe competing origins without a prior baseline.
+- Improved [bgp_detectors.py](/home/ray/dev/linkong/planet/backend/app/services/bgp_detectors.py) so more-specific burst detection groups on normalized supernets and accepts cross-collector clusters instead of only a same-root count heuristic.
+- Improved [bgp_detectors.py](/home/ray/dev/linkong/planet/backend/app/services/bgp_detectors.py) so mass-withdrawal detection can trigger on smaller but cross-collector withdrawal pairs, with severity and confidence scaled by collector spread and event count.
+- Improved anomaly evidence payloads in [bgp_detectors.py](/home/ray/dev/linkong/planet/backend/app/services/bgp_detectors.py) with collector counts, peer counts, unique prefixes, and deduplicated impacted regions, which gives Earth and downstream incident views stronger context.
+- Improved [bgp_common.py](/home/ray/dev/linkong/planet/backend/app/services/collectors/bgp_common.py) so incident aggregation now seeds from both newly created anomalies and already-existing matching anomalies, allowing missing incidents to be rebuilt during later ingests.
+
+### Fixed
+
+- Fixed the “observations exist but anomalies/incidents stay at zero” failure mode where realtime BGP batches often produced no visible signals because detector thresholds were too strict for live traffic windows.
+- Fixed the “existing anomaly but missing incident” gap where the pipeline only created incidents from freshly inserted anomaly rows and skipped rebuilding incident objects for already-known anomaly keys.
+- Fixed stale BGP coverage test expectations in [test_bgp.py](/home/ray/dev/linkong/planet/backend/tests/test_bgp.py) by anchoring recent-window assertions to current UTC time instead of hard-coded past timestamps.
+
 ## 0.22.4
 
 Released: 2026-03-31