Implement comprehensive API key management functionality including
generation, validation, and CRUD operations.
Changes:
- Add API key database schema and operations (create, validate, delete,
toggle)
- Generating a commit message will now work properly with claude sdk and cursor cli and return a suggested commit message
- Implement crypto-based key generation with 'ck_' prefix
- Add session ID tracking in claude-sdk.js and cursor-cli.js
- Update database layer with API key validation and last_used tracking
- Support multi-user API key management with user association
This enables secure programmatic access to the agent service
