Celery logging config

[jonathangreen]

Description

Its possible for the log level config to be None so we get an exception when accessing levelno. This just adds a None check.

Motivation and Context

Fix a minor bug I noticed in while testing #1894.

How Has This Been Tested?

Running tests.

Checklist

• I have updated the documentation accordingly.
• All new and existing tests passed.

[codecov]

Codecov Report

Attention: Patch coverage is 75.00000% with 1 line in your changes missing coverage. Please review.

Project coverage is 90.28%. Comparing base (f372958) to head (29228cd).
Report is 1 commits behind head on main.

Files	Patch %	Lines
src/palace/manager/celery/app.py	75.00%	0 Missing and 1 partial ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #1904      +/-   ##
==========================================
+ Coverage   90.16%   90.28%   +0.11%     
==========================================
  Files         325      332       +7     
  Lines       39701    39867     +166     
  Branches     8645     8647       +2     
==========================================
+ Hits        35798    35994     +196     
+ Misses       2597     2578      -19     
+ Partials     1306     1295      -11     

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[jonathangreen]

Codecov is complaining about this one, but the line it wants tested is pretty difficult to actually test. I think this one is fine to go in as is.

[tdilauro]

🚀