CeleryIntegration changes Task.apply_async signature

[JVenberg]

How do you use Sentry?

Sentry Saas (sentry.io)

Version

2.60.0 (and 1.x)

Steps to Reproduce

import inspect
from celery import Celery
from celery.app.task import Task

import sentry_sdk
from sentry_sdk.integrations.celery import CeleryIntegration

sentry_sdk.init(integrations=[CeleryIntegration()])
app = Celery("repro")

@app.task
def add(x, y):
    return x + y

print(inspect.getcallargs(Task.apply_async, None, (1, 2), {}))

Expected Result

Args bind to self, args, kwargs, ... matching the real apply_async signature.

Actual Result

{'args': (None, (1, 2), {}), 'kwargs': {}}

_wrap_task_run replaces apply_async with a wrapper declared def apply_async(*args, **kwargs). functools.wraps sets __wrapped__, so inspect.signature follows through and is fine, but inspect.getcallargs and mock.patch(autospec=True) read the wrapper's own __code__ and see the bare signature.

Same root cause as #3177; fixed there in #3178 by setting __signature__ on the wrapper. The same fix would apply to _wrap_task_run.

[linear-code]

PY-2490