root 6ee68f5521 Add sync anomaly detection, BU drift monitoring, and findings count investigation ...

- Add BU drift checker that classifies archived findings as BU reassignment,
  severity drift, closure, or decommission via unfiltered Ivanti API queries
- Add post-sync anomaly summary with significance threshold and classification
  breakdown stored in ivanti_sync_anomaly_log table
- Add per-finding BU tracking that detects BU changes across syncs and records
  them in ivanti_finding_bu_history table
- Add drift guard that skips trend history writes when total drops more than 50%
- Add CLOSED_GONE archive state for findings that vanish from the closed set
- Add anomaly banner UI on Vulnerability Triage page for significant sync changes
- Add API endpoints for anomaly latest/history and BU change tracking
- Add diagnostic scripts for drift checking and BU reassignment verification
- Add investigation document and xlsx export for the April 2026 BU reassignment
  incident where 109 findings were moved to SDIT-CSD-ITLS-PIES
- Migrations required: add_closed_gone_state.js, add_sync_anomaly_tables.js

2026-04-24 20:34:34 +00:00

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