Fix admin model catalog visibility

frontend/supabase/migrations/20260808020000_model_admin_runtime_read_policies.sql

@@ -0,0 +1,29 @@
+begin;
+
+do $$
+begin
+  if exists (select 1 from pg_roles where rolname = 'admin_runtime') then
+    drop policy if exists model_providers_admin_select on public.model_providers;
+    create policy model_providers_admin_select on public.model_providers
+      for select to admin_runtime using (true);
+
+    drop policy if exists model_configs_admin_select on public.model_configs;
+    create policy model_configs_admin_select on public.model_configs
+      for select to admin_runtime using (true);
+
+    drop policy if exists model_config_versions_admin_select on public.model_config_versions;
+    create policy model_config_versions_admin_select on public.model_config_versions
+      for select to admin_runtime using (true);
+
+    drop policy if exists model_publish_events_admin_select on public.model_publish_events;
+    create policy model_publish_events_admin_select on public.model_publish_events
+      for select to admin_runtime using (true);
+
+    drop policy if exists model_connection_test_evidence_admin_select on public.model_connection_test_evidence;
+    create policy model_connection_test_evidence_admin_select on public.model_connection_test_evidence
+      for select to admin_runtime using (true);
+  end if;
+end;
+$$;
+
+commit;