feat: connectivity redesign phase 5 — one container per connection instance

instanceable rendering, per-instance up/down on create/delete,
store-service-installed gate, per-instance health

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>

api/service_store_manager.py

@@ -329,12 +329,16 @@ class ServiceStoreManager(BaseServiceManager):
                 if not result.get('ok'):
                     return {'ok': False, 'error': result.get('error') or result.get('stderr', 'docker up failed')}
 
-            # Persist minimal install record
+            # Persist minimal install record. For instanceable connectivity
+            # services the raw compose template is stored so ConnectivityManager
+            # can render one container per connection instance without re-fetching.
             record = {
                 'id': service_id,
                 'manifest': manifest,
                 'installed_at': datetime.utcnow().isoformat(),
             }
+            if manifest.get('instanceable'):
+                record['compose_template'] = template_content
             self.config_manager.set_installed_service(service_id, record)
 
             # Regenerate Caddy (registry now drives routes, no caddy_routes list needed)