fix: clear stale regional map results

scripts/README.md

@@ -1357,6 +1357,20 @@ objects rather than a volume metric; `ADP` is the graphical presumed cadastral
 parcel location rather than a legal survey. The public GRB provider remains
 `not_configured`, and no fetch runs from the browser or during startup.
 
+The verified Tower snapshot for `2026-07-14` contains:
+
+- roads: 84,504 unique `Wegsegment` objects in Dataset
+  `715b24f1-148a-4d50-9c40-d5468f670ffb`;
+- water: 88,332 unique objects (25,648 `WTZ`, 4,605 `WLAS` and
+  58,079 `WGR`) in Dataset `689bb65d-0b03-4c5c-8f42-b5d2d899d8ca`;
+- parcels: 415,288 unique `ADP` objects in Dataset
+  `3cf5e8da-9ab0-49ef-96e4-f74b7557e0a4`.
+
+All three manifests report `reference_truncated=false`. PostGIS row counts
+and distinct source IDs match the manifests exactly, all geometries are
+non-empty and valid in EPSG:4326, and immediate repeat runs reuse the same
+artifact and Dataset.
+
 ## Tower deployment
 
 Push the local branch to Gitea, then rebuild the Unraid/Tower Docker runtime: