Harness-lark: Providing Feishu/Lark Channel Support for DeepSeek Harness

harness-lark is a Lark/Feishu channel plugin for DeepSeek Harness (MIT licensed, repository: https://github.com/huoxue1/harness-lark), used to integrate dsh's capabilities—such as conversations, streaming replies, approval requests, and cloud documents/spreadsheets/calendars/tasks—into the Feishu/Lark messaging channel. Core features include: WebSocket-based IM message sending/receiving with reconnection and deduplication, streaming interactive cards supporting thinking processes and final results (with collapsible panels, latency/token statistics), media upload/download/sending for images/files/audio, cloud document/Wiki/Drive creation and read/write, multi-dimensional table/spreadsheet/calendar/task operations, and RFC 8628 device-code-based user-level