Clear stale on-demand map layers

docs/CODEX_EXECUTION_LOG.md

@@ -10245,7 +10245,8 @@ Implemented:
 - Browser acceptance caught and closed a coverage-label defect: a newly
   acquired small Mol Dataset no longer makes a complete-Flanders theme card
   appear fully loaded. In the Flanders workspace GRB stays `Op aanvraag`;
-  the exact bounded result is shown only after selection.
+  the exact bounded result is shown only after selection and an older active
+  vector layer is not rendered behind it.
 
 Validation:
 - Focused provider, acquisition, route-envelope and frontend contract tests
@@ -10258,3 +10259,12 @@ Validation:
 - The complete readiness gate passed 943 backend tests, backend compilation,
   the 118-route API contract audit, Alembic head `202607160001`, frontend
   TypeScript typecheck and the production Vite build.
+- Tower live acceptance persisted bounded Mol GRB results through PostGIS:
+  339 building contours (5.953873 ha footprint), one road segment
+  (0.0137304 km), two water features (0.0027273 ha plus 0.0050982 km
+  supporting linework) and eight parcels (1.2566294 ha). A repeated exact
+  building request reused the same Dataset and reported `reused=true`.
+- The rebuilt all-in-one deployment remained healthy on port 1202 with
+  PostGIS 3.6 and Alembic head `202607160001`. Live browser acceptance showed
+  all four Flanders GRB cards as `Op aanvraag` and no stale vector content
+  underneath an unmeasured on-demand theme.