feat: add documentation staleness checks to PR review skill

[russellhaering]

Summary

• Adds D1-D4 documentation staleness checks to the PR review skill
• Flags PRs that change documented connector functionality without updating docs/connector.mdx

What it checks

Code	Trigger	Docs section affected
D1	Resource types added/removed, sync/provision support changed	Capabilities table
D2	Action schemas added/removed/modified in *_actions.go	Connector actions table
D3	Required API scopes or permissions changed	Credential gathering
D4	Config fields added/removed/renamed	Configuration instructions

Only warns if docs/connector.mdx exists but isn't already in the PR's changed files. Reads the actual docs to confirm staleness rather than guessing.

[coderabbitai]

Important

Review skipped

Review was skipped due to path filters

⛔ Files ignored due to path filters (1)

• skills/pr-review.md is excluded by none and included by none

CodeRabbit blocks several paths by default. You can override this behavior by explicitly including those paths in the path filters. For example, including **/dist/** will override the default block on the dist directory, by removing the pattern from both the lists.

You can disable this status message by setting the reviews.review_status to false in the CodeRabbit configuration file.

Use the checkbox below for a quick retry:

• 🔍 Trigger review

✨ Finishing Touches

🧪 Generate unit tests (beta)

• Create PR with unit tests
• Post copyable unit tests in a comment
• Commit unit tests in branch review-skill-docs-staleness

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