Get open issues
GET /api/issues?project=name&status=open
Create issue
POST /api/issues
Header: X-API-Key: $BUG_TRACKER_KEY
Update after fix
PATCH /api/issues/:id
Body: { status, commit_hash, commit_url }
Upload attachment
POST /api/upload?issue_id=:id
Body: multipart/form-data (file)