Revert "🤖 fix: add timeout to SSH background spawn to protect against connection hangs"

This reverts commit 4993197.

Author: ethanndickson

src/node/runtime/SSHRuntime.ts

@@ -376,11 +376,11 @@ export class SSHRuntime implements Runtime {
     });
 
     try {
-      // The spawn command backgrounds the process and returns immediately with the PID.
-      // Timeout protects against SSH connection hangs (network issues), not the spawned process.
+      // No timeout - the spawn command backgrounds the process and returns immediately,
+      // but if wrapped in `timeout`, it would wait for the backgrounded process to exit.
+      // SSH connection hangs are protected by ConnectTimeout (see buildSshArgs in this file).
       const result = await execBuffered(this, spawnCommand, {
         cwd: "/", // cwd doesn't matter, we cd in the wrapper
-        timeout: 30, // Generous timeout for SSH connection + shell startup
       });
 
       if (result.exitCode !== 0) {