Add .codecov.yml

[larseggert]

No description provided.

[codecov-commenter]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 89.28%. Comparing base (65ea957) to head (36c0aa3).

Additional details and impacted files

@@           Coverage Diff           @@
##             main      #60   +/-   ##
=======================================
  Coverage   89.28%   89.28%           
=======================================
  Files           2        2           
  Lines         709      709           
  Branches      709      709           
=======================================
  Hits          633      633           
  Misses         69       69           
  Partials        7        7           

Flag	Coverage Δ
linux	89.28% <ø> (ø)

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[Copilot]

Pull request overview

Adds a repository-level Codecov configuration to tune PR coverage reporting and flag behavior.

Changes:

• Introduces .codecov.yml with a linux flag configured for carryforward.
• Configures Codecov PR comment layout to include header, diff, and flags sections.
• Sets PR-only coverage status rules (project threshold is informational; patch status PR-only).

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