format nova reports so they aren't wall of text and brain spraining

Agent reports are currently too log-like. Useful details get buried: context, risk, actions taken, final state, and follow-up.

Please add a structured completion format for git/project work:

• Context
• Risk
• Resolution
• Result
• Follow-up
• Proposed convention

Reference mockup:
https://imgur.com/a/kx2uHGB

This would make reports easier to convert into issues, PR notes, changelog entries, and audit trails.

Why it matters

For shared-checkout / multi-agent work, maintainers need to quickly see:

• what changed
• where it landed
• whether the main checkout stayed clean
• whether signing was verified
• what follow-up is needed

Category

UX improvement / agent workflow reporting / warlock readability