feat(X-Pack): [数据填报]增加统计用户待填报任务条数接口

#12318

sdk/api/api-base/src/main/java/io/dataease/api/msgCenter/MsgCenterApi.java

@@ -0,0 +1,12 @@
+package io.dataease.api.msgCenter;
+
+import io.swagger.v3.oas.annotations.tags.Tag;
+import org.springframework.web.bind.annotation.PostMapping;
+
+@Tag(name = "消息中心")
+public interface MsgCenterApi {
+
+    @PostMapping("/count")
+    long count();
+
+}