feat(subscription): add live usage data and user feedback mechanism

[Paddy1981]

Subscription improvements:

• Add /api/v1/subscription endpoint to fetch live usage from Supabase
• Subscription page now fetches actual analyses_used and analyses_limit
• Default free tier is 5 analyses (was hardcoded to 3)

User feedback for models:

• Add feedback UI on results page ("Correct" / "Incorrect" buttons)
• Add /api/v1/feedback endpoint to store user feedback
• Feedback includes optional notes for context
• Data can be used for future model retraining

https://claude.ai/code/session_01AXKFiU2Ysy3BNrBkPsH9DL

Summary

Type of Change

• Bug fix (non-breaking change fixing an issue)
• New feature (non-breaking change adding functionality)
• Breaking change (fix or feature causing existing functionality to change)
• Documentation update
• Refactoring (no functional changes)
• CI/CD changes

Related Issues

Changes Made

Testing

• Unit tests added/updated
• Manual testing performed
• All existing tests pass

Skill Updates (if applicable)

• ANAL-xxx:
• STAR-xxx:
• MISSION-xxx:
• DISC-xxx:
• RES-xxx:

Multi-IDE Coordination

• Updated .coordination/TASK_LOG.md
• Checked .coordination/FILE_LOCKS.md for conflicts
• Updated .coordination/HANDOFF_NOTES.md if needed

Checklist

• Code follows project style guidelines
• Self-review completed
• Comments added for complex logic
• Documentation updated (if needed)
• No new warnings introduced