BEP028 (Provenance) patches

[effigies]

• Exclude prov files from consideration as sidecars
• ...

[codecov]

Codecov Report

❌ Patch coverage is 52.94118% with 8 lines in your changes missing coverage. Please review.
✅ Project coverage is 86.93%. Comparing base (25c5cf1) to head (3137fa9).

Files with missing lines	Patch %	Lines
src/validators/internal/unusedFile.ts	52.94%	7 Missing and 1 partial ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #305      +/-   ##
==========================================
- Coverage   87.03%   86.93%   -0.10%     
==========================================
  Files          50       50              
  Lines        3724     3735      +11     
  Branches      613      617       +4     
==========================================
+ Hits         3241     3247       +6     
- Misses        474      478       +4     
- Partials        9       10       +1     

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