Add governed Wallonia and Brussels orthophotos

docs/API_CONTRACTS.md

@@ -365,16 +365,20 @@ Vector uploads remain stored as original files and are also persisted into `vect
 
 ### GET `/api/v1/projects/{project_id}/datasets/orthophoto/products`
 
-Return the governed Digitaal Vlaanderen orthophoto product allowlist in the
-canonical envelope. Every product reports its key, display/observation label,
-temporal granularity, native resolution, colour mode, catalogue URL,
-limitations and whether current configured-YOLO detection is allowed.
+Return the governed Belgian orthophoto product allowlist in the canonical
+envelope. It contains Digitaal Vlaanderen products plus `wallonia_latest`
+(SPW) and `brussels_latest` (Paradigm UrbIS). Every product reports its key,
+provider, coverage zone, display/observation label, temporal granularity,
+native resolution, colour mode, catalogue URL, attribution, licence note,
+limitations and whether configured-YOLO detection is allowed.
 
 ### POST `/api/v1/projects/{project_id}/datasets/orthophoto/acquire`
 
 Explicitly acquire a bounded orthophoto selection from a governed official
-Digitaal Vlaanderen WMS product. Arbitrary WMS URLs and layer names are not
-accepted.
+regional WMS product. Arbitrary WMS URLs and layer names are not accepted.
+The regional products require the persisted project Areas `Wallonia` or
+`Brussels-Capital Region` and reject a rectangle unless that Area covers at
+least 99% of it.
 
 ```json
 {
@@ -493,9 +497,9 @@ Safety contract:
   reuse;
 - WMS bytes are georeferenced to EPSG:31370 and persisted only through
   `DatasetService`; no fetch runs on startup;
-- only `most_recent` can enter the current configured-YOLO plus GRB-QA path;
-  historical products are visual evidence and are never validated against the
-  current GRB state;
+- only `most_recent`, `wallonia_latest` and `brussels_latest` can enter the
+  configured-YOLO path; QA must use the matching regional reference source
+  (GRB, PICC or UrbIS). Historical products remain visual evidence;
 - product periods such as `1979_1990` remain explicitly multi-year and are not
   presented as exact annual observations.