feat: logs in api_retrieve_materials_blob()

[jennifer-richards]

No description provided.

[codecov]

Codecov Report

❌ Patch coverage is 0% with 4 lines in your changes missing coverage. Please review.
✅ Project coverage is 88.54%. Comparing base (4580a13) to head (583855c).
⚠️ Report is 6 commits behind head on main.

Files with missing lines	Patch %	Lines
ietf/meeting/views.py	0.00%	4 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #9818      +/-   ##
==========================================
- Coverage   88.55%   88.54%   -0.02%     
==========================================
  Files         316      316              
  Lines       42256    42265       +9     
==========================================
+ Hits        37420    37423       +3     
- Misses       4836     4842       +6     

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