Publish curated GeoIntel source snapshot

backend/app/providers/osm.py

@@ -0,0 +1,20 @@
+from __future__ import annotations
+
+from app.providers.base import BaseReferenceProvider
+
+
+class OSMProvider(BaseReferenceProvider):
+    def __init__(self) -> None:
+        super().__init__(
+            provider_name="osm",
+            display_name="OpenStreetMap",
+            authority_level="contextual",
+            supported_layers=["buildings", "roads", "water", "landuse"],
+            supported_geometry_types=["Polygon", "MultiPolygon", "LineString", "MultiLineString"],
+            supported_query_modes=["area"],
+            fetch_signature="POST /api/v1/external/osm/fetch",
+            limitation_message="OSM live Overpass/download integration is not configured in Sprint 7B.",
+            attribution="OpenStreetMap contributors",
+            license_note="OpenStreetMap data is available under ODbL; attribution is required.",
+            configured=False,
+        )