fix #557: guide permission-driven VPD flow

src/main/java/com/cloudhandson/vpdbackoffice/web/VpdPolicyController.java

@@ -80,6 +80,26 @@ public class VpdPolicyController {
     return "redirect:/vpd-policies";
   }
 
+  @PostMapping("/vpd-policies/default")
+  public String createDefaultPolicy(
+      @RequestParam String objectKey,
+      RedirectAttributes redirectAttributes
+  ) {
+    try {
+      vpdPolicyService.createDefaultPermissionPolicy(objectKey);
+      redirectAttributes.addFlashAttribute(
+          "successMessage",
+          "권한체계 자동 필터를 연결했습니다: " + objectKey
+      );
+    } catch (AppException exception) {
+      redirectAttributes.addFlashAttribute("errorMessage", exception.getMessage());
+    } catch (DataAccessException exception) {
+      RuntimeErrorMessage message = RuntimeErrorMessages.dataAccess(exception);
+      redirectAttributes.addFlashAttribute("errorMessage", message.message());
+    }
+    return "redirect:/vpd-policies";
+  }
+
   @PostMapping("/vpd-filter-policies/filters")
   public String saveFilter(
       @RequestParam(required = false) String functionOwner,