Add Inter-Hub migration bundle importer

docs/specs/data-model.md

@@ -41,6 +41,19 @@ Operations:
 - compatibility fixtures
 - import/export runs
 
+## Initial Persisted Framework Tables
+
+The first replacement slice persists the framework resources that current Inter-Hub
+consumers need during bootstrap and smoke testing:
+
+- `hubs`
+- `hub_capability_manifests`
+- `api_consumers`
+- `api_keys` with hash and prefix only, never full key material
+- `widgets`
+- `interaction_events`
+- `migration_runs` for import summaries, bundle hashes, counts, and diagnostics
+
 ## Migration Posture
 
 - Import Inter-Hub schema facts through explicit migrations or import tools, not ad hoc SQL editing.