개발과정 Archive

この issue には説明がありません。

The issue title suggests archiving development process documentation, but the body is empty. Look for existing documentation in the repository, such as README files or a docs folder, to understand what needs to be archived. Check if there are any recent commits or discussions about the development process to determine what 'Archive' refers to. Since the issue is assigned and very old, confirm with the maintainer if this task is still relevant before proceeding.

索引モデルが issue の本文から書いたものです。