Mutation testing

[ypcrts]

Note

Streamlines CI and testing while tightening account detection.

• CI: Replace discrete build/test/clippy/fmt steps with ./ci.sh in rust.yml; add tracked githooks/pre-commit to mirror CI locally
• Mutation testing: Remove .github/workflows/mutation-testing.yml; add mutants.toml for local runs; ignore mutants.out/; update README to document local-only usage
• Docs: Add Git Hooks section and clarify mutation testing commands in README.md
• Regex fix: Tighten VerizonAccountMatcher context regex by adding a word boundary to pattern_14_with_context
• Tests: Centralize MuPDF serialization via tests/common::with_mupdf_lock; remove per-file mutexes/macros; delete coverage_gaps_test.rs and redistribute cases; add extensive unit/integration tests (regex patterns, secure redaction edge cases, CLI/unit) and new tests/unit/* modules

^{Written by Cursor Bugbot for commit 202554b. This will update automatically on new commits. Configure here.}

[codecov-commenter]

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Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 90.48%. Comparing base (80e0bfe) to head (202554b).
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Additional details and impacted files

@@            Coverage Diff             @@
##             main       #2      +/-   ##
==========================================
- Coverage   91.52%   90.48%   -1.05%     
==========================================
  Files           8        8              
  Lines         838      862      +24     
==========================================
+ Hits          767      780      +13     
- Misses         71       82      +11     

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