Add feedback tracking system for /feedback submissions

Problem

When users submit feedback via the /feedback command, they receive a feedback ID (UUID) but have no way to:

• Check the status of their submission
• See if/how it was addressed
• Get any response or follow-up

This creates a "black hole" experience where feedback feels ignored.

Proposed Solution

Implement a feedback tracking system with one or more of the following:

1. Status portal - A web page where users can check feedback status by ID
2. Email notifications - Optional email updates when feedback is reviewed/resolved
3. Link to GitHub issues - If feedback results in a GitHub issue, provide the connection
4. CLI command - e.g., /feedback status <id> to check status

Benefits

• Improved user trust and engagement
• Closes the feedback loop
• Encourages more quality feedback submissions