dsh-brief-session-title: DSH Session Title Compression Plugin

The `dsh-brief-session-title` plugin for DeepSeek Harness (DSH) resolves the issue of verbose default title generation by optimizing system prompts. It fully reuses the official workflow and features zero intrusion, automatic exclusive takeover, fault tolerance, and configurability. After installation, titles for new sessions are compressed into a single character or word, improving readability and retrieval efficiency while supporting manual renaming and locking.