🐛 fix(db): 适配 schema/owner 限定名，修复 PG/金仓表不存在

- 表列表返回 schema.table/owner.table，避免 search_path 不一致导致 relation does not exist
  - 元数据/导入导出/提交变更统一解析限定名并正确引用
  - 前端查询与数据浏览支持限定名 quote
  - 单元格编辑态时间字段统一显示为 YYYY-MM-DD HH:mm:ss
  close #36

internal/db/oracle_impl.go

@@ -171,7 +171,7 @@ func (o *OracleDB) GetTables(dbName string) ([]string, error) {
 	// dbName is Schema/Owner
 	query := "SELECT table_name FROM user_tables"
 	if dbName != "" {
-		query = fmt.Sprintf("SELECT table_name FROM all_tables WHERE owner = '%s'", strings.ToUpper(dbName))
+		query = fmt.Sprintf("SELECT owner, table_name FROM all_tables WHERE owner = '%s' ORDER BY table_name", strings.ToUpper(dbName))
 	}
 
 	data, _, err := o.Query(query)
@@ -181,6 +181,14 @@ func (o *OracleDB) GetTables(dbName string) ([]string, error) {
 
 	var tables []string
 	for _, row := range data {
+		if dbName != "" {
+			if owner, okOwner := row["OWNER"]; okOwner {
+				if name, okName := row["TABLE_NAME"]; okName {
+					tables = append(tables, fmt.Sprintf("%v.%v", owner, name))
+					continue
+				}
+			}
+		}
 		if val, ok := row["TABLE_NAME"]; ok {
 			tables = append(tables, fmt.Sprintf("%v", val))
 		}