test: add passing health check test

Author: AasthathecoderX

services/auth-service/tests/test_auth.py

@@ -0,0 +1,4 @@
+def test_health_check(client):
+    """Test the health check endpoint at the correct API v1 path."""
+    response = client.get("/api/v1/health") 
+    assert response.status_code == 200