docs: clarify hstore is a contrib extension

Assisted-by: OpenAI:gpt-5

Author: messere1

CN/modules/ROOT/pages/5.12.adoc

@@ -5,7 +5,7 @@
 
 == 概述
 
-`hstore` 是 IvorySQL 内置提供的扩展，用于在单个字段中保存一组文本键值对。它适合存储稀疏属性、应用配置、标签等不需要嵌套 JSON 结构的半结构化数据。
+`hstore` 是 PostgreSQL 的 contrib 扩展，其源码随 IvorySQL 一同位于 `contrib/hstore` 目录中。它用于在单个字段中保存一组文本键值对，适合存储稀疏属性、应用配置、标签等不需要嵌套 JSON 结构的半结构化数据。
 
 本文在 Ubuntu 22.04 x86_64 环境中使用 IvorySQL 5.4（PostgreSQL 18.4）和 hstore 1.8 完成验证。
 
@@ -29,7 +29,7 @@
 
 == 安装
 
-IvorySQL 5.4 官方二进制包已包含 hstore。使用具有创建扩展权限的用户连接数据库并执行：
+IvorySQL 5.4 官方二进制包已包含 hstore，无需另外下载源码或编译第三方模块。使用具有创建扩展权限的用户连接数据库并执行：
 
 [source,sql]
 ----

EN/modules/ROOT/pages/5.12.adoc

@@ -5,7 +5,7 @@
 
 == Overview
 
-`hstore` is an extension included with IvorySQL that stores sets of text key/value pairs in a single column. It is useful for sparse attributes, application settings, labels, and other semi-structured data that does not require nested JSON documents.
+`hstore` is a PostgreSQL contrib extension whose source is included in IvorySQL under `contrib/hstore`. It stores sets of text key/value pairs in a single column and is useful for sparse attributes, application settings, labels, and other semi-structured data that does not require nested JSON documents.
 
 This guide was verified with IvorySQL 5.4 (PostgreSQL 18.4) and hstore 1.8 on Ubuntu 22.04 x86_64.
 
@@ -29,7 +29,7 @@ This guide was verified with IvorySQL 5.4 (PostgreSQL 18.4) and hstore 1.8 on Ub
 
 == Installation
 
-The official IvorySQL 5.4 binary package already contains hstore. Connect as a user allowed to create extensions and run:
+The official IvorySQL 5.4 binary package already contains hstore, so no separate source download or third-party build is required. Connect as a user allowed to create extensions and run:
 
 [source,sql]
 ----