fix: 完成商务迁移复核与接口优化并清理历史资料

internal/data/business/schema.go

@@ -19,14 +19,36 @@ func storageError(err error) error {
 }
 
 func businessTableAvailable(db *gorm.DB, name string) (bool, error) {
-	tables, err := db.Migrator().GetTables()
+	return businessTablesAvailable(db, name)
+}
+
+// 一次检查请求所需的表，不为每个依赖重复枚举整个业务库。
+// 不缓存结果，保留迁移后新建表和运行时连接异常的可见性。
+func businessTablesAvailable(db *gorm.DB, names ...string) (bool, error) {
+	if len(names) == 0 {
+		return true, nil
+	}
+	var tables []string
+	var err error
+	switch db.Dialector.Name() {
+	case "mysql":
+		err = db.Raw("SELECT table_name FROM information_schema.tables WHERE table_schema=DATABASE() AND table_name IN ?", names).Scan(&tables).Error
+	case "sqlite":
+		err = db.Raw("SELECT name FROM sqlite_master WHERE type='table' AND name IN ?", names).Scan(&tables).Error
+	default:
+		tables, err = db.Migrator().GetTables()
+	}
 	if err != nil {
 		return false, business.ErrStorage
 	}
+	found := make(map[string]bool, len(tables))
 	for _, table := range tables {
-		if table == name {
-			return true, nil
+		found[table] = true
+	}
+	for _, name := range names {
+		if !found[name] {
+			return false, nil
 		}
 	}
-	return false, nil
+	return true, nil
 }