refactor: define IScheduleQueryService interface

Phase 2, Step 2.5: Create query service interface
- Define getScheduleResult method signature
- Prepare for extracting query logic from MartialScheduleServiceImpl

Related to Phase 2 refactoring plan

src/main/java/org/springblade/modules/martial/service/IScheduleQueryService.java

@@ -0,0 +1,18 @@
+package org.springblade.modules.martial.service;
+
+import org.springblade.modules.martial.pojo.dto.ScheduleResultDTO;
+
+/**
+ * Schedule Query Service Interface
+ * Responsible for querying schedule results and arrangements
+ */
+public interface IScheduleQueryService {
+
+    /**
+     * Get schedule result for a competition
+     *
+     * @param competitionId Competition ID
+     * @return Schedule result with groups and participants
+     */
+    ScheduleResultDTO getScheduleResult(Long competitionId);
+}