dsh-archived-purge: Purge archived sessions and local files in one go

DSH's built-in archive only hides sessions; logs, projection cache, and workspace accounting remain on disk without a bulk deletion interface. The `dsh-archived-purge` maintained by 5D-artist (category: admin-security, MIT, 1.1.0) lists archived sessions by workspace in "Settings → Archive Cleanup". It supports select-all and individual selection, and upon confirmation, it deletes session log directories, projection cache entries, workspace accounting, and archive flags in a single operation, with an optional deep cleanup of unreferenced attachments and request graph cache. This article introduces its installation command, deletion scope, safety guards, Host routing, and known limitations.