Fix Nova/Cinder stateful CRUD so the full surface and Pulumi matrix pass clean.

Persist aggregates and server security groups in domain tables, add Cinder quota
show from DB-backed defaults, align unit tests with OpenStack series, auto-pick
Keystone :5000/:15000 for smoke, and document test locations plus 6514/6514 results.

app/openstack/seed_discovery.py

@@ -459,6 +459,22 @@ async def seed_discovery_documents(conn: Connection) -> dict[str, int]:
                 }
             },
         ),
+        (
+            "cinder",
+            "quota_set_defaults",
+            "default",
+            {
+                "quota_set": {
+                    "volumes": 100,
+                    "snapshots": 100,
+                    "gigabytes": 1000,
+                    "backups": 10,
+                    "backup_gigabytes": 1000,
+                    "groups": 10,
+                    "per_volume_gigabytes": -1,
+                }
+            },
+        ),
         (
             "nova",
             "console_auth_token_defaults",