fix: attempt to fix sse

lib/db/redis.ts

@@ -55,15 +55,19 @@ export class PubSubManager {
     function ping() {
       clearTimeout(heartbeatTimeout);
       heartbeatTimeout = setTimeout(() => {
+        try {
           void writer.write(":)\n\n").catch(() => { });
+        } catch { }
         ping();
       }, 90000); // cloudflare timeout = 100s
     }
 
     const write = (payload: PubPayload) => {
+      try {
         void writer
           .write(this.constructMessage(payload.data, payload.event))
           .catch(() => { });
+      } catch { }
       ping();
     };
 
@@ -83,6 +87,7 @@ export class PubSubManager {
       console.log(` DSC ${topic}`);
 
       sub.unsubscribe(`${this.prefix}${topic}`, handler);
+      void writer.close().catch(() => { });
       clearInterval(heartbeatTimeout);
       clearTimeout(timeout);
     };