docs: add REST API and branch protection guidance

[mherod]

Summary

• Clarify branch protection applies even in solo repos — always use feature branches
• Add new section: GitHub API — prefer REST over GraphQL, with concrete command examples for PR creation, merging, branch updates, and CI checks

Test plan

• Pre-commit hooks pass (biome format)
• Docs-only change, no code impact

[claude]

PR Review: CLAUDE.md guidance improvements

Overview

Two focused improvements to the release/workflow guidance in CLAUDE.md: clarifying that branch protection applies universally (including solo repos), and adding a practical REST-over-GraphQL section with concrete gh api examples.

Findings

No issues found.

👍 What's Good

• The branch protection clarification is useful — the "even in a solo/personal repo" note prevents a common surprise
• Generalizing the branch example from chore/release-<version> to <type>/<slug>-<issue-number> makes it applicable beyond release workflows
• The REST API examples use gh's :owner/:repo substitution correctly and cover the main PR operations (create, merge, update-branch, CI check)
• The rate-limit rationale is a good reason for the preference — keeps the guidance grounded

LGTM ✅