Add tests for authentication and utilities, and update dependencies

- Created a new test package for services and added tests for AuthService.
- Implemented tests for user registration, login, and token creation.
- Added a new test package for utilities and included tests for password and JWT utilities.
- Updated `uv.lock` to include new dependencies: bcrypt, email-validator, pyjwt, and pytest-asyncio.

app/api/v1/main.py

@@ -13,4 +13,4 @@ logger = get_logger(__name__)
 def health() -> dict[str, str]:
     """Health check endpoint."""
     logger.info("Health check endpoint accessed")
-    return {"status": "healthy"}
+    return {"status": "healthy"}