Description:
In src/infra/process-respawn.ts, the spawnDetachedGatewayProcess function uses child_process.spawn() to start a detached process (lines 51-57). However, the child object is unref'd without attaching an error listener. If spawn fails asynchronously (e.g., due to ENOMEM or the executable being missing), the ChildProcess instance emits an error event. Because there is no error listener attached, Node.js treats it as an unhandled exception and crashes the parent process.

Impact:
Process crash on spawn failure, potential DoS.

File Links:

• process-respawn.ts#L51-L57

Proposed Fix:
Attach a .on(error, () => {}) handler to the spawned child before calling child.unref(), or handle the error properly by rejecting if it's wrapped in a promise.