Update logging and unpin numpy and cython versions in pyproject.toml

[alicjapolanska]

Fix issues with path to logging config yaml

Unpin numpy and Cython to ensure numpy 2 compatibility (still relying on packages that need numpy<2 e.g. distrax so keeping it pinned in requirements).

Remove some unused imports

[codecov]

Codecov Report

Attention: Patch coverage is 89.47368% with 2 lines in your changes missing coverage. Please review.

Project coverage is 95.65%. Comparing base (6e29129) to head (cafd90e).

Files with missing lines	Patch %	Lines
harmonic/logs.py	89.47%	2 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #306      +/-   ##
==========================================
- Coverage   95.65%   95.65%   -0.01%     
==========================================
  Files          14       14              
  Lines        2304     2300       -4     
==========================================
- Hits         2204     2200       -4     
  Misses        100      100              

Flag	Coverage Δ
	95.65% <89.47%> (?)

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[CosmoMatt]

Looks good to me!