feat(employee-big-brother): 新增建联率统计与柱状图接口

- Controller 增加 /self_complete、/employeeCompleteBarChart 两个端点
- Mapper 新增 selectEmployeeBrotherCompleteBarChart、selectEmployeeBrotherWithOperationStatus 查询
- Service 层实现个人及多用户建联率统计逻辑
- XML 补充对应 SQL，支持按天数与用户列表过滤

tkdata-model-server/src/main/resources/mapper/employeebigbrother/EmployeeBigBrotherMapper.xml

@@ -228,4 +228,39 @@
                 </when>
             </choose>
     </select>
+
+    <select id="selectEmployeeBrotherCompleteBarChart"
+            resultType="cn.iocoder.yudao.module.tkdata.controller.admin.employeehosts.vo.CompletedRateVO">
+        SELECT
+        user_id AS userId,
+        COUNT(DISTINCT
+        CASE WHEN operation_status = 1 THEN display_id END) AS finishedNum
+        FROM server_employee_big_brother
+        WHERE deleted = 0
+        AND operation_status = 1
+        <!-- 日期范围：今天或过去 7 天（含今天） -->
+        AND update_time >= DATE_SUB(CURDATE(), INTERVAL #{days,jdbcType=INTEGER} - 1 DAY)
+        <if test="list != null and list.size() > 0">
+            AND user_id IN
+            <foreach collection="list" item="user_id" open="(" separator="," close=")">
+                #{user_id}
+            </foreach>
+        </if>
+        GROUP BY user_id
+    </select>
+
+    <select id="selectEmployeeBrotherWithOperationStatus"
+            resultType="cn.iocoder.yudao.module.tkdata.controller.admin.employeehosts.vo.CompletedRateVO">
+        SELECT
+        user_id          AS userId,
+        SUM(CASE WHEN operation_status = 1 THEN 1 ELSE 0 END) AS finishedNum,
+        SUM(CASE WHEN operation_status = 0 THEN 1 ELSE 0 END) AS unfinishedNum,
+        COUNT(*) AS totalNum
+        FROM server_employee_big_brother
+        WHERE deleted = 0
+        <if test="userId != null">
+            AND user_id = #{userId}
+        </if>
+        GROUP BY user_id
+    </select>
 </mapper>