Close RC3 live acceptance

docs/RC_ROADMAP_BELGIUM_NORTH_SEA.md

@@ -146,8 +146,8 @@ editions and licences must still pass source-specific probes before activation.
 | RC-0 | complete | freeze scope and produce release evidence baseline |
 | RC-1 | complete | backup, restore and data safety |
 | RC-2 | complete | health, capabilities and stale-runtime correctness |
-| RC-3 | in progress | temporal detection/QA correctness and observability |
-| RC-4 | pending | national/maritime scope and provider coverage contracts |
+| RC-3 | complete | temporal detection/QA correctness and observability |
+| RC-4 | in progress | national/maritime scope and provider coverage contracts |
 | RC-5 | pending | deployment, secrets, configuration, fresh install and rollback |
 | RC-6 | pending | complete CI, dependency and supply-chain gates |
 | RC-7 | pending | critical API envelope typing and contract validation |
@@ -262,10 +262,15 @@ reconciled five orphaned jobs and two orphaned analysis runs; zero remain
 
 ## RC-3 - Temporal QA correctness and observability
 
-**State: implementation complete; live deployment acceptance pending.** The
-local release gate passes backend compilation, all 974 backend tests, frontend
-typecheck/build, the integrated readiness script, one Alembic head and complete
-offline migration SQL generation.
+**State: complete.** The local release gate passes backend compilation, all
+974 backend tests, frontend typecheck/build, the integrated readiness script,
+one Alembic head and complete offline migration SQL generation. Tower runs
+immutable build `a28f2497e8d0da7d108828875ba9ffedda3c1688`, reports PostgreSQL,
+PostGIS 3.6, migration `202607160001`, storage and configured YOLO as ready,
+and contains no orphaned running Job or AnalysisRun. Live browser acceptance
+proved that Detection Lab starts with an empty raster choice, disables its
+primary action and reports the required operator choice without console
+errors.
 
 ### Work