dsh-feishu-bridge wz-heng

Fail-closed Feishu (Lark) channel bridge for DeepSeek Harness (dsh) — chat with a bot, get agent turns back. Opt-in human-in-the-loop bash approval (Allow/Deny cards, fail-closed timeout), one-message /pair onboarding, webhook signature/timestamp/replay verification, daily latest-SDK canary. Community plugin, not DeepSeek-official.