[DEVEX-1523] Add shared Claude AI code review reusable workflow

[ronneseth]

Summary

• Adds claude-review.yaml reusable workflow wrapping anthropics/claude-code-action@v1
• Reviews PRs for correctness, security vulnerabilities, data integrity risks, race conditions, and breaking API changes
• Supports configurable model, max turns, and repo-specific review rules via inputs
• Auto-approves low-risk changes; posts inline comments (never REQUEST_CHANGES) for concerns

JIRA: DEVEX-1523

Dependency: Merge the terraform PR first (creates the ai-reviewer team and machine user).

Made with Cursor

[cursor]

PR Summary

Medium Risk
Introduces a new GitHub Actions workflow that runs with pull-requests: write and uses external AI tooling plus injected secrets, so misconfiguration could affect PR metadata or leak tokens. No application/runtime code changes.

Overview
Adds a new reusable workflow (.github/workflows/claude-review.yaml) to run anthropics/claude-code-action@v1 on demand via workflow_call.

The workflow is configurable (model, max turns, and repo-specific appended review rules), checks out full git history, and runs with pull-requests: write so it can post reviews/comments using provided anthropic_api_key and ai_reviewer_github_token secrets.

^{Reviewed by Cursor Bugbot for commit 7c1901d. Bugbot is set up for automated code reviews on this repo. Configure here.}