fix(ci): exclude CHANGELOG.md from link-check and Prettier race

[dgtalbug]

Problem

PR #142 (release-please) is blocked by two CI failures caused by the same file: CHANGELOG.md.

link-check — lychee finds a 404 on the compare URL in CHANGELOG.md:

[404] https://github.com/dgtalbug/dextree/compare/v1.16.0...v1.17.0

The tag doesn't exist yet — it's created after the release PR merges. The existing --exclude-path './CHANGELOG.md' arg has no effect because lychee's path matching doesn't resolve the ./ prefix against the glob input correctly.

static-checks — pnpm format:check fails on the unformatted CHANGELOG. The release-please-prettier workflow exists to fix this, but it races with static-checks. Both fire simultaneously on the PR push event; static-checks is faster and sees the unfixed file.

Fix

• _link-check.yml: change --exclude-path './CHANGELOG.md' → --exclude-path 'CHANGELOG.md' so lychee actually skips the file.
• .prettierignore: add CHANGELOG.md so pnpm format:check never touches it. The dedicated release-please-prettier workflow owns formatting that file; excluding it from the general check eliminates the race permanently.

Test plan

• Merge this PR, then re-run CI on chore(main): release 1.17.0 #142 — both link-check and static-checks should pass
• Verify a future release-please PR also passes both checks without manual intervention

[coderabbitai]

No actionable comments were generated in the recent review. 🎉

ℹ️ Recent review info

⚙️ Run configuration

Configuration used: Organization UI

Review profile: ASSERTIVE

Plan: Pro

Run ID: ed6037e2-f2c6-4d97-aa00-aa37e4990a5c

📥 Commits

Reviewing files that changed from the base of the PR and between c49d31d and e1fed97.

📒 Files selected for processing (2)

• .github/workflows/_link-check.yml
• .prettierignore

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📝 Walkthrough

Changes:

• Fixed lychee link-check exclusion pattern for CHANGELOG.md by removing the ./ prefix in --exclude-path argument (now 'CHANGELOG.md' instead of './CHANGELOG.md'), allowing the exclusion to work correctly with lychee's path matching logic.

• Added CHANGELOG.md to .prettierignore to exclude it from the static-checks formatting validation step, eliminating the race condition where static-checks failed before the release-please-prettier workflow had a chance to format the file.

Risks:

• The .prettierignore change creates a workflow dependency: proper CHANGELOG.md formatting now relies entirely on the release-please-prettier workflow. If that workflow is disabled, broken, or skipped, CHANGELOG.md could merge to main unformatted.

Deferred Validation:

• Solution effectiveness depends on re-running CI on PR #142 to confirm both link-check and static-checks pass without blocking.

Walkthrough

Lychee link-check exclusion pattern for CHANGELOG.md is updated from ./CHANGELOG.md to CHANGELOG.md, and CHANGELOG.md is added to .prettierignore with comments explaining the exclusion prevents formatting conflicts with the release-please workflow.

Changes

CHANGELOG tool exclusions

Layer / File(s)	Summary
Lychee and Prettier CHANGELOG exclusions .github/workflows/_link-check.yml, .prettierignore	Lychee link-check --exclude-path argument updated to CHANGELOG.md; CHANGELOG.md added to Prettier ignore list with release-please race-condition explanatory comments.

Estimated code review effort

🎯 1 (Trivial) | ⏱️ ~2 minutes

Suggested labels

area:ci, type:bug

Poem

📋 Two lines guard a CHANGELOG true,
From lychee's sight and Prettier's view—
Release workflows dance without a fight,
No race conditions in the night. ✨

🚥 Pre-merge checks | ✅ 5

✅ Passed checks (5 passed)

Check name	Status	Explanation
Title check	✅ Passed	The title accurately captures the main change: excluding CHANGELOG.md from both link-check and Prettier to resolve CI race conditions.
Description check	✅ Passed	The description is directly related to the changeset, providing clear context on the problem (lychee 404, formatting race), the fix applied, and a test plan.
Docstring Coverage	✅ Passed	No functions found in the changed files to evaluate docstring coverage. Skipping docstring coverage check.
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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