feat: add vsm hub metadata

Application/Migration/1744588800-vsm-hub-metadata.sql

@@ -0,0 +1,21 @@
+-- IHUB-WP-0019 T03 - first-class VSM hub metadata
+
+ALTER TABLE hubs
+    ADD COLUMN hub_family TEXT,
+    ADD COLUMN vsm_function TEXT,
+    ADD COLUMN vsm_system TEXT;
+
+ALTER TABLE hubs
+    ADD CONSTRAINT hubs_vsm_metadata_consistency CHECK (
+        (hub_family IS NULL AND vsm_function IS NULL AND vsm_system IS NULL)
+        OR (
+            hub_family = 'vsm'
+            AND vsm_function IS NOT NULL
+            AND vsm_function <> ''
+            AND vsm_system IN ('1', '2', '3', '3*', '4', '5', 'environment')
+        )
+    );
+
+CREATE INDEX hubs_hub_family_idx ON hubs (hub_family);
+CREATE INDEX hubs_vsm_system_idx ON hubs (vsm_system)
+    WHERE vsm_system IS NOT NULL;