fixed the biller Id Saving problem added 404 not found url

src/main/java/com/billpaymentservice/bbps/exception/GlobalExceptionHandler.java

@@ -9,6 +9,7 @@ import org.springframework.http.*;
 import org.springframework.validation.FieldError;
 import org.springframework.web.bind.MethodArgumentNotValidException;
 import org.springframework.web.bind.annotation.*;
+import org.springframework.web.servlet.NoHandlerFoundException;
 
 import com.billpaymentservice.bbps.dto.ResponseModel;
 
@@ -36,6 +37,18 @@ public class GlobalExceptionHandler {
         resp.setData(fieldErrors);
         return ResponseEntity.status(HttpStatus.BAD_REQUEST).body(resp);
     }
+    
+    @ExceptionHandler(NoHandlerFoundException.class)
+    public ResponseEntity<ResponseModel<?>> handleNotFound(NoHandlerFoundException ex) {
+        logger.warn("Endpoint not found: {}", ex.getRequestURL());
+        ResponseModel<?> resp = new ResponseModel<>(
+            "Endpoint not found: " + ex.getRequestURL(),
+            "FAILED",
+            HttpStatus.NOT_FOUND.value(),
+            null
+        );
+        return ResponseEntity.status(HttpStatus.NOT_FOUND).body(resp);
+    }
 
     @ExceptionHandler(AppException.class)
     public ResponseEntity<ResponseModel<?>> handleAppException(AppException ex) {