fix(server): fix daemon startup race and reduce log bloat

The desktop app could time out connecting to the daemon on first launch
because the PID file advertised a listen address before the HTTP server
was actually listening. The supervisor now writes the PID lock with
listen: null and updates it only after the worker sends a paseo:ready
IPC message confirming the server is listening.

- Rename daemon-runner.ts to supervisor-entrypoint.ts
- PID lock acquired with listen: null, updated via paseo:ready IPC
- Worker sends paseo:ready after httpServer.listen() resolves
- Desktop polls until listen is non-null before returning to the app
- Remove PASEO_PID_LOCK_MODE and external lock mode
- Remove unnecessary env overrides (PASEO_HOME, PASEO_CORS_ORIGINS) from
  desktop daemon spawn
- Reduce trace log bloat: inbound/outbound WebSocket messages now log
  only message type and payload size instead of full payloads
- Supervisor restarts worker on SIGKILL (covers OOM)

packages/server/scripts/dev-runner.ts

@@ -7,7 +7,7 @@ dotenv.config({
   quiet: true,
 });
 
-const daemonRunnerEntry = fileURLToPath(new URL("./daemon-runner.ts", import.meta.url));
+const daemonRunnerEntry = fileURLToPath(new URL("./supervisor-entrypoint.ts", import.meta.url));
 const result = spawnSync(
   process.execPath,
   ["--inspect", "--heapsnapshot-near-heap-limit=3", "--max-old-space-size=3072", "--report-on-fatalerror", "--report-directory=/tmp/paseo-reports", ...process.execArgv, daemonRunnerEntry, "--dev", ...process.argv.slice(2)],