fix(Ray): Retain the original function name when patching Ray tasks

Without "@functools.wraps" added, Ray exposes Prometheus metrics with all tasks named "new_func"

Author: svartalf

sentry_sdk/integrations/ray.py

@@ -1,4 +1,5 @@
 import inspect
+import functools
 import sys
 
 import sentry_sdk
@@ -17,7 +18,6 @@
     import ray  # type: ignore[import-not-found]
 except ImportError:
     raise DidNotEnable("Ray not installed.")
-import functools
 
 from typing import TYPE_CHECKING
 
@@ -54,6 +54,7 @@ def new_remote(f=None, *args, **kwargs):
 
         def wrapper(user_f):
             # type: (Callable[..., Any]) -> Any
+            @functools.wraps(user_f)
             def new_func(*f_args, _tracing=None, **f_kwargs):
                 # type: (Any, Optional[dict[str, Any]], Any) -> Any
                 _check_sentry_initialized()
@@ -78,6 +79,19 @@ def new_func(*f_args, _tracing=None, **f_kwargs):
 
                     return result
 
+            # Patching new_func signature to add the _tracing parameter to it
+            # Ray later inspects the signature and finds the unexpected parameter otherwise
+            signature = inspect.signature(new_func)
+            params = list(signature.parameters.values())
+            params.append(
+                inspect.Parameter(
+                    "_tracing",
+                    kind=inspect.Parameter.KEYWORD_ONLY,
+                    default=None,
+                )
+            )
+            new_func.__signature__ = signature.replace(parameters=params)
+
             if f:
                 rv = old_remote(new_func)
             else: