fix(attendance): normalize DingTalk match statuses

Store and validate stable English status codes for unmatched, pending, and matched attendance records so import, filtering, and auto-match use the same values.

apps/server/src/attendance/attendance.service.ts

@@ -344,14 +344,14 @@ export class AttendanceService {
     }
 
     record.matchedStudentId = dto.studentId;
-    record.matchStatus = '已匹配';
+    record.matchStatus = 'matched';
     return this.dingRawRepo.save(record);
   }
 
   // ── Auto-match unmatched dingtalk records via dingUserId → userId mapping chain ──
   async autoMatchDingRecords(): Promise<{ matched: number; total: number }> {
     const unmatched = await this.dingRawRepo.find({
-      where: { matchStatus: '未处理' },
+      where: { matchStatus: 'unmatched' },
     });
 
     if (unmatched.length === 0) return { matched: 0, total: 0 };
@@ -369,7 +369,7 @@ export class AttendanceService {
       if (studentId == null) continue;
 
       record.matchedStudentId = studentId;
-      record.matchStatus = '已匹配';
+      record.matchStatus = 'matched';
       await this.dingRawRepo.save(record);
       matched++;
     }