docs: record Mol benchmark decision

CHANGELOG.md

@@ -14,6 +14,9 @@
 - Added a fail-closed Mol benchmark report that groups exact model/tile/overlap/threshold candidates and gates four independent positive holdouts plus a pure-empty background control.
 - Kept canonical footprint-IoU metrics authoritative and made model-quality rejection a reported evidence outcome rather than a hidden runner failure or automatic model mutation.
 - Added readiness, all-in-one image and focused pass/reject regression coverage without changing APIs, migrations, inference behavior or dependencies.
+- Executed the active small-building model over Achterbos, Gompel, Donk and Postel plus the Postel-bos pure-empty control: mean F1 `0.5975`, minimum zone F1 `0.4749`, micro F1 `0.6338` and zero background detections.
+- Accepted the active candidate for bounded operator use after evaluating 3,624 of 3,829 raw references; kept 205 outside-coverage references and 101 box-to-footprint diagnostic matches explicit rather than inflating canonical metrics.
+- Exported 7,078 persisted evidence features, audited 1,381 false negatives and 1,211 false positives, and rendered 96 balanced review cards across all four zones with no missing source tiles.
 
 ## Sprint 184 Detection QA coverage and matching diagnostics (2026-07-14)