feat(grpc): add gRPC server infrastructure and schedule sync service

Add gRPC server support with configurable TLS, environment-based settings, and Wire injection. Implement schedule synchronization service with task runner integration for external course data fetching.

- Add gRPC configuration with env var overrides (APP_GRPC_ENABLED, APP_GRPC_PORT, etc.)
- Create gRPC server infrastructure with runner task management
- Implement ScheduleSyncService for course data synchronization
- Add sync endpoint to schedule handler for external system integration
- Update repository with context-aware batch delete operation
- Wire all dependencies including zap logger for structured logging

internal/wire/handler.go

@@ -22,7 +22,6 @@ var HandlerSet = wire.NewSet(
 	handler.NewPushHandler,
 	handler.NewStickerHandler,
 	handler.NewVoteHandler,
-	handler.NewScheduleHandler,
 
 	// 需要特殊处理的 Handler
 	ProvidePostHandler,
@@ -30,6 +29,7 @@ var HandlerSet = wire.NewSet(
 	ProvideSystemMessageHandler,
 	ProvideGroupHandler,
 	ProvideGorseHandler,
+	ProvideScheduleHandler,
 )
 
 // ProvidePostHandler 提供帖子处理器
@@ -72,3 +72,11 @@ func ProvideGroupHandler(
 func ProvideGorseHandler(cfg *config.Config, db *gorm.DB) *handler.GorseHandler {
 	return handler.NewGorseHandler(cfg.Gorse, db)
 }
+
+// ProvideScheduleHandler 提供课表处理器
+func ProvideScheduleHandler(
+	scheduleService service.ScheduleService,
+	scheduleSyncService service.ScheduleSyncService,
+) *handler.ScheduleHandler {
+	return handler.NewScheduleHandler(scheduleService, scheduleSyncService)
+}