feat: add Fatalf logging method to Logger interface and ServiceLogger

- Introduced Fatalf method in Logger interface for logging fatal messages with formatted content.
- Implemented Fatalf in ServiceLogger to log fatal messages and exit the program, enhancing error handling capabilities.

core/interfaces/logger.go

@@ -13,4 +13,7 @@ type Logger interface {
 
 	// Errorf logs a formatted error message.
 	Errorf(format string, args ...interface{})
+
+	// Fatalf logs a formatted fatal message.
+	Fatalf(format string, args ...interface{})
 }