dsh-turn-watchdog: Reporting suspected stuck turns in DSH live sessions

dsh-turn-watchdog is a lightweight, read-only plugin for DeepSeek Harness (DSH) designed to monitor suspected stuck states in live sessions. It determines anomalies by periodically scanning sessions based on two conditions: the last event ending abnormally (not `turn/end` or `session/end-seed`) and idle time exceeding a threshold (default 10 minutes), while excluding subagent sessions. The plugin's core functions include injecting warning text into the prompt context and providing a `turn_watchdog_status` query tool to retrieve a list of specific stuck sessions. Its operational scope is strictly limited to read-only observation; it does not fix sessions, interrupt turns, or restart services, and it has zero dependencies and no HTTP routing. Installation requires using local link paths and...