…objects (#3121)

* Fix callable detection to support all callable objects (functools.partial, etc)

Fixes #2008

The old implementation checked for __code__ attribute directly, which
doesn't exist for callable objects like functools.partial. This caused
an AttributeError when trying to use such objects with find_max_global
and find_min_global functions.

Changed to use Python's inspect.signature() which properly handles all
callable objects including:
- Regular functions
- Lambda functions
- functools.partial objects
- Class methods
- Any object with __call__ method

The fix includes a fallback to the old __code__ method for backward
compatibility in case inspect.signature fails for any reason.

* Update the code to loop through params.values() instead of params itself, since parameters is a dictionary-like object. The earlier code tried to access .second on the iterator, which isn’t valid when working with dict values

Signed-off-by: Samaresh Kumar Singh <[email protected]>

* Fix parameter counting to exclude *args and **kwargs

The previous code was counting VAR_POSITIONAL (*args) and VAR_KEYWORD
(**kwargs) parameters in the total count, which caused functions like
'lambda a, b, c, *args' to be counted as having 4 parameters instead
of 3. Now only regular parameters are counted, while still checking
for the presence of *args to allow variable argument functions.

Also removed test_callable_fix.py as it was causing pytest errors.

Signed-off-by: Samaresh Kumar Singh <[email protected]>

---------

Signed-off-by: Samaresh Kumar Singh <[email protected]>