API Health Check Endpoint Design

Design health check endpoints for:

Application Components:
- Database: [TYPE]
- Cache: [TYPE]
- External services: [LIST]
- Message queue: [TYPE IF ANY]

Requirements:
- Kubernetes readiness/liveness: [YES/NO]
- Detailed vs. simple checks: [BOTH]
- Authentication: [PUBLIC/PROTECTED]

Please provide:
1. Health check endpoint structure
2. Component-level checks implementation
3. Aggregated health status logic
4. Response format and status codes
5. Timeout handling for checks
6. Integration with monitoring systems