chore: support composite record unique key

[katherinehhh]

This is a ...

• [ ] New feature
• [x] Improvement
• [ ] Bug fix
• [ ] Others

Motivation

支持多个字段作为记录的联合唯一索引

Description

1.不支持在界面上创建联合主键的表（支持数据库中建好的联合主键表索引） 2.可在视图、SQL 表中使用，手动配置联合主键（Record unique key） 3.可在外部数据源中使用，手动配置联合主键（Record unique key），初始化应该支持自动识别

Related issues

Showcase

Changelog

Language	Changelog
🇺🇸 English	support composite record unique key
🇨🇳 Chinese	支持联合主键

Docs

Language	Link
🇺🇸 English
🇨🇳 Chinese

Checklists

• [ ] All changes have been self-tested and work as expected
• [ ] Test cases are updated/provided or not needed
• [ ] Doc is updated/provided or not needed
• [ ] Component demo is updated/provided or not needed
• [ ] Changelog is provided or not needed
• [ ] Request a code review if it is necessary