fix: wrap regex with parentheses

[waynexia]

In case a|b|c will become ^a|b|c$ instead of ^(a|b|c)$

[Copilot]

Pull Request Overview

This PR ensures that regex patterns are properly grouped and fully anchored by wrapping the inner regex with parentheses.

• Updates test cases in src/parser/parse.rs to use parenthesized regex patterns.
• Adjusts regex formatting in src/label/matcher.rs to ensure correct anchoring of alternations.

Reviewed Changes

Copilot reviewed 2 out of 2 changed files in this pull request and generated 1 comment.

File	Description
src/parser/parse.rs	Updated test regex strings to wrap inner patterns with parentheses.
src/label/matcher.rs	Modified regex formatting to wrap the original regex with parentheses.

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 99.01%. Comparing base (711d484) to head (dd6982d).
Report is 1 commits behind head on main.

Additional details and impacted files

@@           Coverage Diff           @@
##             main     #110   +/-   ##
=======================================
  Coverage   99.01%   99.01%           
=======================================
  Files          14       14           
  Lines        6694     6702    +8     
=======================================
+ Hits         6628     6636    +8     
  Misses         66       66           

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[v0y4g3r]

LGTM