Update dependencies, deprecate cheminventory helper

[ml-evs]

Updates various hard deps (httpx, respx) and subdeps, and adds a deprecation warning to the cheminventory helper.

[codecov]

Codecov Report

❌ Patch coverage is 0% with 2 lines in your changes missing coverage. Please review.
✅ Project coverage is 37.01%. Comparing base (f0d5499) to head (577ee51).
⚠️ Report is 12 commits behind head on main.

Files with missing lines	Patch %	Lines
src/datalab_api/helpers.py	0.00%	2 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main      #65      +/-   ##
==========================================
- Coverage   37.16%   37.01%   -0.16%     
==========================================
  Files           5        5              
  Lines         487      489       +2     
==========================================
  Hits          181      181              
- Misses        306      308       +2     

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