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/dto/attendance.dto.ts

@@ -78,7 +78,7 @@ export class AttendanceCalendarQueryDto {
 export class QueryDingRawDto {
   @IsOptional()
   @IsString()
-  @IsIn(['未处理', '已匹配', '待匹配'])
+  @IsIn(['unmatched', 'pending', 'matched'])
   matchStatus?: string;
 }