dsh-memory-porter: Moving Claude and ChatGPT Historical Memories into DeepSeek Harness

`dsh-memory-porter` is a plugin in the DSH ecosystem designed for “memory migration.” It addresses the loss of historical memories after users switch platforms by securely migrating historical conversations and memories from Claude, ChatGPT, and Claude Code to the local environment. The plugin employs local BM25 retrieval and verbatim evidence verification to ensure data accuracy, and it supports a manual confirmation mode. All data is stored locally only, with no network access or telemetry, enabling users to recall memories at any time through the tool.