I want the original lark package's Bot to support heartbeat-based tenant access token renewal for chat…

I want the original lark package's Bot to support heartbeat-based tenant access token renewal for chat…: a task in MiMo-V2.6-RL-harbor-code: MiMo-V2.6-RL Code (Harbor) (Harbor dataset). The first StartHeartbeat fetch is part of the method's observable behavior: if the Feishu/Lark auth request…

The task

The first `StartHeartbeat` fetch is part of the method's observable behavior: if the Feishu/Lark auth request succeeds, `StartHeartbeat` returns nil and the bot has a non-empty tenant access token; if that initial auth request fails, `StartHeartbeat` returns the error and does not silently continue. `StartHeartbeat`…

Part of FineEnvs/MiMo-V2.6-RL-harbor-code.