Performance: pre-filter document list in scheduled workflow checks

[shamoon]

Proposed change

Currently, scheduled workflow checks will check every document that passes the date filter with document_matches_workflow. This works, but of course can be very slow, see the linked thread. Instead, we can try to 'pre-filter' the documents to reduce the number that we fully check. The only 'downside' of this is some redundancy, but theres also an advantage I think because this is just kind of a 'first swipe' but the later document_matches_workflow check will still run.

In particularly the filename check which later runs with fnmatch is simplified to a regex, worst case is no regex in sqlite and it would silently fail but the later check would still run.

Hopefully didnt miss anything here, welcome feedback of course.

See #10012 (8k docs, initially > 30 min --> ~10 seconds)

Type of change

• Bug fix: non-breaking change which fixes an issue.
• New feature / Enhancement: non-breaking change which adds functionality. Please read the important note above.
• Breaking change: fix or feature that would cause existing functionality to not work as expected.
• Documentation only.
• 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

All modified and coverable lines are covered by tests ✅

Project coverage is 97.80%. Comparing base (eb07876) to head (d67326f).
Report is 11 commits behind head on dev.

✅ All tests successful. No failed tests found.

Additional details and impacted files

@@           Coverage Diff            @@
##              dev   #10031    +/-   ##
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  Coverage   97.80%   97.80%            
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  Files         512      512            
  Lines       22005    22021    +16     
  Branches     1845     1720   -125     
========================================
+ Hits        21522    21538    +16     
- Misses        481      483     +2     
+ Partials        2        0     -2     

Components	Coverage Δ
backend	96.66% <100.00%> (+<0.01%)	⬆️
frontend	99.07% <ø> (ø)

Flag	Coverage Δ
backend-python-3.10	96.66% <100.00%> (+<0.01%)	⬆️
backend-python-3.11	96.66% <100.00%> (+<0.01%)	⬆️
backend-python-3.12	96.66% <100.00%> (+<0.01%)	⬆️
frontend-node-20.x	99.07% <ø> (ø)

Flags with carried forward coverage won't be shown. Click here to find out more.

Files with missing lines	Coverage Δ
src/documents/matching.py	97.68% <100.00%> (+0.18%)	⬆️
src/documents/tasks.py	97.46% <100.00%> (+0.03%)	⬆️

... and 2 files with indirect coverage changes