ci(lint): use golangci-lint v2.13 for Go 1.27 support

[chrisdeeming]

Summary

• Bump the golangci-lint-action version input from v2.11 to v2.13.
• The lint job uses go-version: stable, which now resolves to Go 1.27.1. golangci-lint v2.11 is built with Go 1.26 and panics with file requires newer Go version go1.27 (application built with go1.26) when it type-checks the 1.27 standard library. This is why Lint fails on feat(worktree): create and manage development worktrees #14 and feat(cli): visual and UX polish across all commands #15 and would fail on main today; main's last passing Lint run (17 August) used Go 1.26.6.
• v2.13.0 is the first golangci-lint release with Go 1.27 support. Dependabot does not bump this input because it only tracks the action SHA.
• Add .github/workflows/ci.yml to the workflow's own path filters so changes to the lint or test jobs are exercised by CI, the same way ci: publish PHP 8.1–8.3 images #22 did for the image workflow. Without this the first commit here would not have run Lint at all.

Testing

• Ran golangci-lint v2.13.2 locally against the heads of feat(worktree): create and manage development worktrees #14 and feat(cli): visual and UX polish across all commands #15: 0 issues on both.
• CI on this PR ran Lint directly and it passed.
• Test (race) failed on this PR, but that failure is pre-existing on main (its 17 August run failed the same way): parallel tests in cmd/xf race on viper's package-level singleton. The fix is the config.Init mutex commit in feat(worktree): create and manage development worktrees #14 (f1b4a48). A cherry-pick of that commit was pushed to this branch after the merge and did not land; it will arrive with feat(worktree): create and manage development worktrees #14.

Checklist

• The change is focused and does not include unrelated work.
• Relevant automated and/or manual testing has been performed.
• UI changes include screenshots or video where appropriate.
• Upgrade, compatibility, and performance implications have been considered.

[coderabbitai]

No actionable comments were generated in the recent review. 🎉

ℹ️ Recent review info

⚙️ Run configuration

Configuration used: Organization UI

Review profile: ASSERTIVE

Plan: Essentials

Run ID: 165851c6-aa50-48c4-876b-2b82ec7633bf

📥 Commits

Reviewing files that changed from the base of the PR and between c7c6376 and 8bc80f3.

📒 Files selected for processing (1)

• .github/workflows/ci.yml

Included review availability: 3 reviews are currently available. Your included PR review attempts over the past 7 days set your current allowance at 5 reviews per hour.

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📝 Walkthrough

Walkthrough

The CI workflow now includes changes to .github/workflows/ci.yml in push and pull-request path filters targeting main. The lint job now uses golangci-lint v2.13.

Changes

CI workflow update

Layer / File(s)	Summary
Update CI workflow configuration .github/workflows/ci.yml	The workflow reruns for changes to its own file. The lint job now uses golangci-lint v2.13 instead of v2.11.

Priority: ⬇️ Low

Merge Risk: ⚪ Minimal · up to 8bc80

The workflow update has no identified issue preventing merge.

🚥 Pre-merge checks | ✅ 5

✅ Passed checks (5 passed)

Check name	Status	Explanation
Title check	✅ Passed	The title clearly identifies the main change: updating golangci-lint to v2.13 for Go 1.27 support.
Description check	✅ Passed	The description includes a clear summary, testing details, and checklist status. The omitted visual evidence and notes sections are not required for this workflow-only change.
Docstring Coverage	✅ Passed	No functions found in the changed files to evaluate docstring coverage. Skipping docstring coverage check. Docstring coverage is scoped to functions touched by this diff. Analyzed 0 functions across 0…
Linked Issues check	✅ Passed	Check skipped because no linked issues were found for this pull request.
Out of Scope Changes check	✅ Passed	Check skipped because no linked issues were found for this pull request.

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_{Comment @coderabbitai help to get the list of available commands.}

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 36.51%. Comparing base (b082823) to head (8bc80f3).
⚠️ Report is 14 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main      #23      +/-   ##
==========================================
+ Coverage   30.99%   36.51%   +5.51%     
==========================================
  Files          50       49       -1     
  Lines        5307     4820     -487     
==========================================
+ Hits         1645     1760     +115     
+ Misses       3396     3060     -336     
+ Partials      266        0     -266     

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