* Add health check API endpoint with database connectivity
* Update locale handling to fallback to default language on invalid input
* Add health check endpoints for application readiness and liveness
- Introduced `/api/health/readiness` endpoint to check if the application can serve requests, including database connectivity.
- Introduced `/api/health/liveness` endpoint to verify if the application is running independently of external dependencies.
- Updated the health check logic to streamline database connectivity checks and response handling.
* Refactor health check logic
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Co-authored-by: Julen Dixneuf <julen.d@padoa-group.com>
