Fix OSError in Vercel Serverless Functions deployment

[taesungh]

Similar to HackAtUCI/HackUCI-Site#86
The API sporadically encounters a runtime issue causing requests to fail

[ERROR] OSError: [Errno 24] Too many open files
Traceback (most recent call last):
  File "/var/task/vc__handler__python.py", line 305, in vc_handler
    response = asgi_cycle(__vc_module.app, body)
  File "/var/task/vc__handler__python.py", line 201, in __call__
    loop = asyncio.new_event_loop()
  File "/var/lang/lib/python3.9/asyncio/events.py", line 761, in new_event_loop
    return get_event_loop_policy().new_event_loop()
  File "/var/lang/lib/python3.9/asyncio/events.py", line 659, in new_event_loop
    return self._loop_factory()
  File "/var/lang/lib/python3.9/asyncio/unix_events.py", line 54, in __init__
    super().__init__(selector)
  File "/var/lang/lib/python3.9/asyncio/selector_events.py", line 53, in __init__
    selector = selectors.DefaultSelector()
  File "/var/lang/lib/python3.9/selectors.py", line 350, in __init__
    self._selector = self._selector_cls()

where vc__handler__python.py refers to Vercel's Python runtime handler.

[taesungh]

Submitted Kludex/mangum#315 to ask if they have any thoughts.

[samderanova]

We might be able to set up a Vercel CRON job to automatically redeploy at a certain interval. Currently investigating this.

[taesungh]

Deployed temporary AWS Lambda function which runs periodically to check Axiom logs and redeploy last Vercel deployment when needed.

[taesungh]

It seems that while Vercel added support for Python 3.12 (including ASGI) via vercel/vercel#11675, the logic for ASGICycle in vc_init.py was updated to fit with the changes in Python 3.10

The loop parameter has been removed from most of asyncio‘s high-level API following deprecation in Python 3.8.

Perhaps upgrading to Python 3.12 on Vercel will fix the OSError issue?