Fix: Only create a Correspondent if the email matches rule filters

[stumpylog]

Proposed change

I agree this isn't correct behavior or at the very least unexpected. This small fix makes it so Correspondents are only created if there is a message or attachment matching the filters, in addition to matching the IMAP criteria. So if a "From" or "Subject" matches, but the attachment filename doesn't, there will not be a Correspondent created early.

Fixes #4429

Type of change

• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to not work as expected)
• Other (please explain):

Checklist:

• I have read & agree with the contributing guidelines.
• If applicable, I have included testing coverage for new code in this PR, for backend and / or front-end changes.
• If applicable, I have tested my code for new features & regressions on both mobile & desktop devices, using the latest version of major browsers.
• If applicable, I have checked that all tests pass, see documentation.
• I have run all pre-commit hooks, see documentation.
• I have made corresponding changes to the documentation as needed.
• I have checked my modifications for any breaking changes.

[codecov]

Codecov Report

Merging #4431 (0d30b9e) into dev (cb271de) will decrease coverage by 0.01%.
The diff coverage is 85.71%.

@@            Coverage Diff             @@
##              dev    #4431      +/-   ##
==========================================
- Coverage   95.90%   95.89%   -0.01%     
==========================================
  Files         359      359              
  Lines       13709    13712       +3     
  Branches     1094     1094              
==========================================
+ Hits        13147    13149       +2     
- Misses        558      559       +1     
  Partials        4        4              

Flag	Coverage Δ
backend	94.52% <85.71%> (-0.02%)	⬇️
frontend	97.50% <ø> (ø)

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Files	Coverage Δ
src/paperless_mail/mail.py	88.25% <85.71%> (-0.21%)	⬇️

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[shamoon]

Great catch, thanks. I'll let you decide re coverage

[github-actions]

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