修复测试：补充分析服务单元测试桩的成绩统计方法实现

RuoYi-Vue/ruoyi-train/src/test/java/com/ruoyi/train/service/impl/PackageCAttendanceSemanticsConservationTest.java

@@ -369,5 +369,10 @@ public class PackageCAttendanceSemanticsConservationTest
         {
             return Collections.emptyMap();
         }
+
+        public Long countStudentScores(String studentId)
+        {
+            return 0L;
+        }
     }
 }

RuoYi-Vue/ruoyi-train/src/test/java/com/ruoyi/train/service/impl/TrainAnalysisServiceTest.java

@@ -476,5 +476,10 @@ public class TrainAnalysisServiceTest
             map.put("auth_status", "ACTIVE");
             return map;
         }
+
+        public Long countStudentScores(String studentId)
+        {
+            return 0L;
+        }
     }
 }