feat: add deployment zone overlays

tests/test_registry.py

@@ -309,6 +309,8 @@ def test_registry_accepts_financial_graph_and_materializes_vnext_fields(tmp_path
     assert graph["apiVersion"] == "railiance.fabric/v1alpha2"
     assert graph["schema_version"] == "financial-fabric-v1"
     assert graph["nodes"][0]["evidence"]["review_state"] == "accepted"
+    assert graph["nodes"][0]["deployment_overlay"]["deployment_environment"] == "dev"
+    assert graph["nodes"][0]["deployment_overlay"]["deployment_scenario"] == "bernd-laptop"
     assert edge["relationship_category"] == "utility"
     assert edge["boundary"]["crosses_fabric_boundary"] is False
     assert edge["boundary"]["crosses_subfabric_boundary"] is True
@@ -558,6 +560,15 @@ def _financial_graph() -> dict:
                     "subfabric_id": None,
                     "environment": "local",
                 },
+                "deployment_overlay": {
+                    "deployment_environment": "dev",
+                    "deployment_scenario": "bernd-laptop",
+                    "routing_authority": "loopback",
+                    "access_zone": "private-dev",
+                    "policy_authority": "local-loopback-binding",
+                    "exposure_class": "local-only",
+                    "route_evidence": {"host": "127.0.0.1", "port": 8000, "protocol": "tcp"},
+                },
                 "ownership": {
                     "owner_actor_id": "actor.railiance.primary-lord",
                     "owner_role": "lord",