WIP | Support Python = 3.8+ in JSON logger

[MikolajBalcerek]

json_logger doesn't work with Python 3.8=+ due to (last working is Python 3.7)

• renamed field fmt to format in logging
• strict % formatting being needed

raise ValueError("Invalid format '%s' for '%s' style" % (self._fmt, self.default_format[0]))

ValueError: Invalid format '(@timestamp) (level) (name) (@message) (message)' for '%' style

This fixes the usage to newer logging behaviour

---

This fix won't make it enough to work with newer Python (3.12=+) releases, because this entire package uses pkg_resources, which is deprecated and/or removed in new Python releases (removed in Python 3.12) - this would also would have to be fixed

    from wikia.common.logger import json_logger
  File "/tmp/recommendationimport/src/wikia/__init__.py", line 4, in <module>
    __import__('pkg_resources').declare_namespace(__name__)
    ^^^^^^^^^^^^^^^^^^^^^^^^^^^
ModuleNotFoundError: No module named 'pkg_resources'

On older Python releases you will get a warning instead

/usr/local/lib/python3.12/site-packages/wikia/common/logger/__init__.py:9: UserWarning: pkg_resources is deprecated as an API. See https://setuptools.pypa.io/en/latest/pkg_resources.html. The pkg_resources package is slated for removal as early as 2025-11-30. Refrain from using this package or pin to Setuptools<81.

This is thus fixable with limiting support to old python release, rewriting python-commons to use importlibs (preferred), or installing setuptools as dependency.

I don't have the time to fix it further

[mikulskibartosz]

Use namespace packages (https://packaging.python.org/en/latest/guides/packaging-namespace-packages/) instead of __import__('pkg_resources').declare_namespace(__name__)

[MikolajBalcerek]

Package moved structure

[MikolajBalcerek]

datetime.utcfromtimestamp is deprecated