feat(bot): auto-resolve unresolved review comments via background AI agent

[rickcedwhat-ai]

Originally scoped to CodeRabbit, but the underlying idea applies directly to the new rickcedwhat-ai/rickcedrabbit bot.

Idea

When the bot marks a PR as ai-review: unresolved, offer a way to automatically attempt fixes for the flagged issues — either as a follow-up commit or a suggested patch — without requiring the author to manually address each one.

Possible trigger

A new checkbox or command in the HQ comment: e.g. @rickcedwhat-ai fix or a "🔧 Auto-fix" checkbox that kicks off a background job.

Relevant context

• The bot already tracks actionable issues in the review body and review history
• The worker has access to the diff and context files at review time
• Fix attempts would need to be careful about scope — patches only, no force-pushes