fix: graceful ctrl+c shutdown and await session-end memory writes

src/gateway/session-bridge.ts

@@ -53,7 +53,7 @@ export class SessionBridge {
   }
 
   /** Remove a WS connection. Does NOT destroy the session (persists in SQLite). */
-  disconnect(connectionId: string): void {
+  async disconnect(connectionId: string): Promise<void> {
     const client = this.clients.get(connectionId);
     if (client) {
       // Only remove the agent if no other clients share the session
@@ -73,15 +73,17 @@ export class SessionBridge {
             writeToMemory: summaryConfig.write_to_memory,
             memoryNamespace: summaryConfig.memory_namespace,
           };
-          void summarizeSessionOnEnd({
-            agent,
-            sessionId: client.sessionId,
-            history,
-            config: mappedConfig,
-            memoryStore: this.config.memoryStore,
-          }).catch((error) => {
+          try {
+            await summarizeSessionOnEnd({
+              agent,
+              sessionId: client.sessionId,
+              history,
+              config: mappedConfig,
+              memoryStore: this.config.memoryStore,
+            });
+          } catch (error) {
             console.warn('Session end summary failed:', error);
-          });
+          }
         }
         this.agents.delete(client.sessionId);
       }