🐛 fix(sync): 修复 Oracle 同步连接与 MySQL 备份导出异常

- 分离 Oracle/OceanBase Oracle 同步连接 Service Name 与选中 schema

- 兼容旧同步请求中 database 被 schema 覆盖的情况

- 规范 MySQL/MariaDB SHOW CREATE TABLE 标识符引用

Refs #549

Refs #518

internal/sync/source_query_sync.go

@@ -47,7 +47,7 @@ func validateSourceQuerySyncConfig(config SyncConfig) (string, error) {
 
 func resolveTargetQueryTable(config SyncConfig, tableName string) (string, string, string, string) {
 	targetType := resolveMigrationDBType(config.TargetConfig)
-	targetSchema, targetTable := normalizeSchemaAndTable(targetType, config.TargetConfig.Database, tableName)
+	targetSchema, targetTable := normalizeSchemaAndTable(targetType, selectedSyncTargetDatabase(config), tableName)
 	targetQueryTable := qualifiedNameForQuery(targetType, targetSchema, targetTable, tableName)
 	return targetType, targetSchema, targetTable, targetQueryTable
 }