Make [Ctrl-C] exits with zen graceful in gUnicorn

[bitterpanda63]

Fixing error with gUnicorn [Ctrl-C], the process doesnt exit gracefully

[2025-09-17 13:15:55 +0200] [59997] [INFO] Handling signal: intTraceback (most recent call last):  File "/var/home/primary/.pyenv/versions/3.9.19/lib/python3.9/multiprocessing/process.py", line 315, in _bootstrap    self.run()  File "/var/home/primary/.pyenv/versions/3.9.19/lib/python3.9/multiprocessing/process.py", line 108, in run    self._target(*self._args, **self._kwargs)  File "/var/home/primary/Aikido/firewall-python/aikido_zen/background_process/aikido_background_process.py", line 50, in __init__    conn = listener.accept()  File "/var/home/primary/.pyenv/versions/3.9.19/lib/python3.9/multiprocessing/connection.py", line 463, in accept    c = self._listener.accept()  File "/var/home/primary/.pyenv/versions/3.9.19/lib/python3.9/multiprocessing/connection.py", line 609, in accept    s, self._last_accepted = self._socket.accept()  File "/var/home/primary/.pyenv/versions/3.9.19/lib/python3.9/socket.py", line 293, in accept    fd, addr = self._accept()KeyboardInterrupt[2025-09-17 13:15:55 +0200] [60078] [INFO] Worker exiting (pid: 60078)Error in atexit._run_exitfuncs:Traceback (most recent call last):  File "/var/home/primary/.pyenv/versions/3.9.19/lib/python3.9/multiprocessing/util.py", line 357, in _exit_function    p.join()  File "/var/home/primary/.pyenv/versions/3.9.19/lib/python3.9/multiprocessing/process.py", line 147, in join    assert self._parent_pid == os.getpid(), 'c

We fix this by not trying to start the background process outside of the forks (in gunicorn_config.py), and by adding graceful exit handlers to the background process