Mindspace DSH Session Memory Plugin: Adding Editable Multi-user Session Memory for DeepSeek Harness

`mindspace-dsh-session-memory` is a community plugin for DeepSeek Harness (DSH) designed to provide editable, session-isolated multi-user memory capabilities. To address the issue of context confusion in long sessions, it categorizes memory into three layers: an explicit persona layer (to replace default presets) and a separate contextual section for character information and general memory. Compatible with DSH version 0.1.1 and licensed under the MIT License, its core features include reading and writing memory via the `get_session_memory` and `update_session_memory` interfaces, Chinese rendering of model fields, lossless migration of V1-V3 data to the V4 sidecar format, and default settings.