Solid Cable用のマイグレーションはSolid Cable用のマイグレーションのパスに置くのが良さそうということを発見した
https://github.com/rails/solid_cable?tab=readme-ov-file#installation
https://github.com/zunda/test-rails8/commit/2d1c4e77879d56c81ea19d69ba7f83e3c9f0a9e0
GitHubGitHub - rails/solid_cable: A database backed ActionCable adapterA database backed ActionCable adapter. Contribute to rails/solid_cable development by creating an account on GitHub.