Merge branch 'release/3.1' into dev/3.1_release_merge

src/main/java/com/ai/da/controller/ConvenientInquiryController.java

@@ -103,7 +103,7 @@ public class ConvenientInquiryController {
     @GetMapping("/recentNewUserChart")
     public Response<Map<String, Object>> recentNewUserChart(@Parameter(description = "startTime") @RequestParam @Nullable String startTime,
                                                             @Parameter(description = "endTime") @RequestParam @Nullable String endTime,
-                                                            @Parameter(description = "userType") @RequestParam Integer userType) {
+                                                            @Parameter(description = "userType") @RequestParam @Nullable Integer userType) {
         return Response.success(convenientInquiryService.recentNewUserChart(startTime, endTime, userType));
     }