Implement Type Autocreation Option

[FerdinandSu]

Description / 描述

English:
Currently, when inserting an entry with an undefined type, the API throws TypeUndefinedException. Add an option to automatically create types when they don't exist:

• Add autoCreateType parameter to insert entry endpoint
• If enabled, automatically create the type with the provided category
• Return appropriate response indicating type was auto-created

中文:
目前，当插入具有未定义类型的条目时，API 会抛出 TypeUndefinedException。添加一个选项，在类型不存在时自动创建类型：

• 向插入条目端点添加 autoCreateType 参数
• 如果启用，则自动使用提供的类别创建类型
• 返回适当的响应，指示类型已自动创建

Difficulty / 难度

Easy-Medium / 简单-中等

Estimated Time / 预计时间

2-3 hours

Acceptance Criteria / 验收标准

• Add autoCreateType parameter to Entry model
• Modify DirectLedgerManager.Insert() logic
• Return metadata about created type in response
• Update API documentation
• Add unit tests for autocreation logic

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[gdy23319]

I'd like to work on this issue. Will put up a PR before Dec 6th.

[gdy23319]

sorry, wont be able to PR.
had some difficulties getting the backend to work.
otther people can pick up this issue !