Resolve PR Comments

Analyze unresolved PR review comments, fix valid concerns, and draft responses for comments that do not require code changes.

When explicitly invoked with extra text, treat that text as the PR number or URL. If no PR reference is provided, infer it from the current branch.

Process

1. Preferred execution
   • If subagents are available, use github-dev:pr-comment-resolver and pass the PR reference.
   • Otherwise follow the manual steps below.