Enable governed GRB evolution

docs/CODEX_EXECUTION_LOG.md

@@ -9387,3 +9387,35 @@ Validation so far:
 Next:
 - Run the full release gate, deploy to Tower, execute a live read-only plan and
   then stage/apply only the exact confirmed official edition.
+
+## Sprint 224 - Governed GRB evolution (2026-07-16)
+
+Implemented:
+- Audited the two retained regional editions for buildings, roads, water and
+  parcels. All 2,108,425 persisted VectorFeatures have an official
+  `source_feature_id`; none uses the former 64-character geometry-hash
+  fallback.
+- Added a fail-closed GRB identity contract to temporal object comparison.
+  Legacy snapshots require authoritative, area-clipped, non-truncated
+  provenance from an approved regional operator and every selected identifier
+  must be present, unique and match its collection prefix.
+- Made future regional GRB operators abort when an official OGC feature ID is
+  missing and persist their identity scheme/prefixes explicitly.
+- Replaced ambiguous same-year labels such as `2026-2026` with daily edition
+  ranges and explained that registration changes do not date physical change.
+- Documented an honest refresh-readiness matrix for all major source families;
+  no additional provider fetch or automatic refresh was enabled.
+
+Boundaries:
+- No migration, new persistence model, scheduler, browser-triggered import or
+  parallel temporal engine was added.
+- Object comparison remains bounded to 5,000 selected features and falls back
+  to metric-only output whenever source identity cannot be proven.
+
+Validation so far:
+- Focused GRB operator and temporal tests pass: 39 tests.
+- Frontend typecheck and production build pass.
+
+Next:
+- Run the full release gate, deploy, verify a real bounded GRB edition delta
+  through the canonical API and inspect the daily Evolution UI on Tower.