Adding parent or higher directory to workspace.library of the .luarc.json of a subproject produces erroneous duplicate field/etc warnings

まだ誰も着手していません。

### How are you using the lua-language-server?

NeoVim

### Which OS are you using?

Linux

### What is the issue affecting?

Annotations, Type Checking, Diagnostics/Syntax Checking

### Expected Behaviour

No warnings issued for duplicate fields and similar.

### Actual Behaviour

Many warnings about duplicates are produced

### Reproduction steps

Create a subproject and add the parent directory to the subproject's .luarc.json, then create some annotated type and observe warnings about duplicates.

### Additional Notes

It is really a small issue but it would be great to be able to work on subprojects and get require() completions for both the true module name of the project, as well as my other projects within the path

### Log File

_No response_

まず、.luarc.json で親ディレクトリを workspace.library に追加しているサブプロジェクトを使い、Linux 上の NeoVim で問題を再現します。注釈付きの型と重複フィールドの診断を比較し、プロジェクトのパス全体で require() の補完を確認します。設定によって重複に関する誤った警告が発生せず、期待される補完が維持されれば完了です。

索引モデルが issue の本文から書いたものです。