fix(core): improve shutdown cleanup, socket/stream robustness, and memory/cache handling

ts/opsserver/handlers/logs.handler.ts

@@ -318,11 +318,15 @@ export class LogsHandler {
         try {
           // Use a timeout to detect hung streams (sendData can hang if the
           // VirtualStream's keepAlive loop has ended)
+          let timeoutHandle: ReturnType<typeof setTimeout>;
           await Promise.race([
-            virtualStream.sendData(encoder.encode(logData)),
-            new Promise<never>((_, reject) =>
-              setTimeout(() => reject(new Error('stream send timeout')), 10_000)
-            ),
+            virtualStream.sendData(encoder.encode(logData)).then((result) => {
+              clearTimeout(timeoutHandle);
+              return result;
+            }),
+            new Promise<never>((_, reject) => {
+              timeoutHandle = setTimeout(() => reject(new Error('stream send timeout')), 10_000);
+            }),
           ]);
         } catch {
           // Stream closed, errored, or timed out — clean up