v0.1.0-beta.0 — release candidate

Community plugin (developer preview, NOT an official DeepSeek product).

• Observe-and-notify lifecycle supervisor: lifecycle_silence / deadline_unclosed / abnormal_turn_streak.
• Read-only over the session log; state lives under $DSH_HOME/plugins/session-supervisor.
• At-least-once delivery; hard limits on host lifetime, cold sessions, and hung agents are in README.md.
• Install: dsh plugin --profile <name> add <tarball>.
• npm publication is pending publisher scope/credentials; install from this tarball meanwhile.