feat: add map-driven orthophoto analysis

backend/README.md

@@ -1057,3 +1057,19 @@ PostGIS intersection path.
 - `bash scripts/backend_test.sh`
 - `bash scripts/backend_dev.sh`
 - `bash scripts/smoke_backend_import.sh`
+
+## Bounded official orthophoto acquisition
+
+`POST /api/v1/projects/{project_id}/datasets/orthophoto/acquire` accepts an
+explicit EPSG:4326 map rectangle and stores the official Digitaal Vlaanderen
+`OMWRGBMRVL`/`Ortho` response as a canonical EPSG:31370 raster Dataset. The
+default safety envelope is 128-1,024 m per side, 1 m/pixel, 32 MiB and a
+24-hour exact-request cache. It runs synchronously behind the existing Job
+abstraction and never during startup.
+
+Settings: `ORTHOPHOTO_ENABLED`, `ORTHOPHOTO_WMS_URL`,
+`ORTHOPHOTO_WMS_LAYER`, `ORTHOPHOTO_RESOLUTION_M`,
+`ORTHOPHOTO_MIN_SIDE_M`, `ORTHOPHOTO_MAX_SIDE_M`,
+`ORTHOPHOTO_TIMEOUT_SECONDS`, `ORTHOPHOTO_MAX_RESPONSE_MB` and
+`ORTHOPHOTO_CACHE_TTL_HOURS`. Keep the official HTTPS URL and 1 m profile
+unless a separately verified deployment/model profile requires a change.