156a988080
- Create timestamped backup before migration writes - Add migrateAgentConfigToCategory() for model→category migration - Add shouldDeleteAgentConfig() for cleanup when matching defaults - Add Prometheus and Metis to agent name map - Comprehensive test coverage for new functionality 🤖 GENERATED WITH ASSISTANCE OF [OhMyOpenCode](https://github.com/code-yeongyu/oh-my-opencode)