fix(team_process): Clean up stuck processing owners on startup and batch completion

- Add CleanupStuckProcessingOwners database method to reset owners stuck in processing status back to valid state
- Call cleanup routine on application startup to recover from previous abnormal exits
- Call cleanup routine after batch processing completes to ensure no orphaned processing states remain
- Add markOwnerResult calls in processSingleTeam when team invitations are full to properly track owner status
- Prevents owners from being permanently stuck in processing state due to unexpected shutdowns or errors

backend/cmd/main.go

@@ -85,6 +85,11 @@ func main() {
 		fmt.Printf("%s[清理]%s 已清理 %d 个遗留的运行中批次记录\n", colorYellow, colorReset, affected)
 	}
 
+	// 启动时清理遗留的 processing 状态母号（上次异常退出可能残留）
+	if affected, err := database.Instance.CleanupStuckProcessingOwners(); err == nil && affected > 0 {
+		fmt.Printf("%s[清理]%s 已重置 %d 个残留的处理中母号为有效状态\n", colorYellow, colorReset, affected)
+	}
+
 	// 启动自动补号检查器（需在前端开启开关才会实际补号）
 	api.StartAutoAddService()