OCR filter

[sudan45]

Implement GraphQL filters for LeadPreviewAttachment by type and excluding specific IDs.

This PR doesn't introduce any:

• temporary files, auto-generated files or secret keys
• n+1 queries
• flake8 issues
• print
• typos
• unwanted comments

This PR contains valid:

• tests
• permission checks (tests here too)
• translations

[codecov]

Codecov Report

Attention: Patch coverage is 33.33333% with 4 lines in your changes missing coverage. Please review.

Project coverage is 79.73%. Comparing base (4d7ee5d) to head (88afdb2).
Report is 13 commits behind head on develop.

Files with missing lines	Patch %	Lines
apps/lead/filter_set.py	33.33%	4 Missing ⚠️

Additional details and impacted files

@@             Coverage Diff             @@
##           develop    #1526      +/-   ##
===========================================
+ Coverage    79.63%   79.73%   +0.10%     
===========================================
  Files          464      464              
  Lines        30076    30142      +66     
  Branches      3379     3385       +6     
===========================================
+ Hits         23952    24035      +83     
+ Misses        6124     6107      -17     

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