1. Install OpenClaw on Windows with gateway registered as a Scheduled Task (login trigger)
2. Start gateway via Scheduled Task — works normally
3. Trigger any SIGUSR1 restart:
   - config.patch with auto-restart, OR
   - gateway tool with restart, OR
   - any internal code path that sends SIGUSR1
4. Observe: original process exits, Scheduled Task marks job complete
5. Spawned child (new pid) runs but is unmanaged
6. Kill or crash the child process
7. Gateway stays down permanently — Scheduled Task will NOT restart it

When the gateway receives a restart signal (SIGUSR1 via config.patch or internal restart), it should restart reliably and remain supervised by the Windows Scheduled Task. After restart, the gateway should continue running under the task scheduler's management.

On Windows with the gateway registered as a Scheduled Task (login trigger), SIGUSR1 causes the gateway to spawn a new detached child process and exit the original process. The Scheduled Task sees the original process exit and marks the job as complete, leaving the spawned child process orphaned and unmanaged.

Consequences:
- The child process runs fine temporarily but is NOT supervised by Scheduled Task
- If the child process crashes, hangs, or is killed, the gateway stays down permanently
- No automatic recovery — requires manual intervention to bring gateway back
- Scheduled Task shows failure code (-2147023829)

From the logs:
  2026-02-22T07:22:15.342Z | signal SIGUSR1 received
  2026-02-22T07:22:15.346Z | received SIGUSR1; restarting
  2026-02-22T07:22:15.450Z | feishu[feishu1]: abort signal received, stopping
  2026-02-22T07:22:15.473Z | event shutdown
  2026-02-22T07:22:17.615Z | signal SIGUSR1 received (second signal during shutdown, ignored)
  2026-02-22T07:22:45.516Z | restart mode: full process restart (spawned pid 10096)

The spawned child (pid 10096) runs fine temporarily but is not supervised.

This also affects config.patch with built-in restart, which internally uses SIGUSR1. Any feature that triggers SIGUSR1 on Windows Scheduled Task will hit this issue.