* fix(gateway): handle async EPIPE on stdout/stderr during shutdown
The console capture forward() wrapper catches synchronous EPIPE errors,
but when the receiving pipe closes during shutdown Node emits the error
asynchronously on the stream. Without a listener this becomes an
uncaught exception that crashes the gateway, causing macOS launchd to
permanently unload the service.
Add error listeners on process.stdout and process.stderr inside
enableConsoleCapture() that silently swallow EPIPE/EIO (matching the
existing isEpipeError helper) and re-throw anything else.
Closes#13367
* guard stream error listeners against repeated enableConsoleCapture() calls
Use a separate streamErrorHandlersInstalled flag in loggingState so that
test resets of consolePatched don't cause listener accumulation on
process.stdout/stderr.
