Add Belgium and North Sea coverage foundation

backend/app/api/routes/external.py

@@ -7,7 +7,8 @@ from app.core.errors import AppError
 from app.db.session import get_db
 from app.models import Area, Project
 from app.providers.registry import fetch_provider_data, get_provider, import_provider_dataset, list_provider_capabilities
-from app.schemas import ExternalFetchRequest, ExternalFetchResponse, ProviderImportRequest
+from app.schemas import CoverageResolveRequest, ExternalFetchRequest, ExternalFetchResponse, ProviderImportRequest
+from app.services.coverage_registry_service import CoverageRegistryService
 from app.utils.response import envelope
 
 router = APIRouter(prefix="/external", tags=["external"])
@@ -46,6 +47,22 @@ def list_external_providers() -> dict:
     })
 
 
+@router.get("/coverage/catalog")
+def get_coverage_catalog() -> dict:
+    return envelope(CoverageRegistryService.catalog().model_dump())
+
+
+@router.post("/coverage/resolve")
+def resolve_project_coverage(payload: CoverageResolveRequest, db: Session = Depends(get_db)) -> dict:
+    result = CoverageRegistryService.resolve(
+        db,
+        project_id=payload.project_id,
+        bbox=payload.bbox,
+        themes=payload.themes,
+    )
+    return envelope(result.model_dump())
+
+
 @router.get("/providers/capabilities")
 def get_external_provider_capabilities() -> dict:
     return envelope({