docs: clarify primary type labels are issues-only (PRs use ownership labels) (#35)

[SamuelHassine]

Summary

Clarifies the shared label taxonomy so it can never be misread (by a human or an automated reviewer):

• Primary type labels (feature / bug / documentation) are applied to issues only, alongside the GitHub issue Type.
• Pull requests do not carry a primary type label — the type: title prefix conveys the type. PRs should instead carry an ownership label (filigran team / community) to differentiate the author, plus any useful area/workflow labels.

Updated .github/LABELS.md, .github/labels.yml, and the CONTRIBUTING conventions block.

Closes #35

[SamuelHassine]

🤖 [AI-generated]

Hey @SamuelHassine! 👋 I'm Sam, your convention guardian. I've reviewed PR #36 and here's a summary of what I checked and adjusted:

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🏷️ Labels

Action	Label	Reason
✅ Added	filigran team	Ownership label for an org-member contribution. Per .github/LABELS.md §2–§3, PRs carry an ownership label instead of a primary type label.

(No primary type label added or removed — documentation is issue-only, and the docs: title prefix already conveys the type.)

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📋 PR Description Quality

Overall: Good 🎉

Your PR description looks complete and well-structured. Great job! 🎉

Clear Summary, itemized clarification of the label taxonomy, the exact files touched (.github/LABELS.md, .github/labels.yml, CONTRIBUTING), and a Closes #35 issue link. A docs-only change needs no test evidence.

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💡 Title was already fully compliant — valid docs: type, lowercase imperative verb "clarify", no trailing period, and the required (#35) issue reference. Nice work! For future PRs, please keep following the contribution conventions.

Thanks for contributing! 🚀