Add a circuit breaker for the Typesense HTTP transport

Add a circuit breaker for the Typesense HTTP transport: a task in MiMo-V2.6-RL-harbor-code: MiMo-V2.6-RL Code (Harbor) (Harbor dataset). When the Typesense server starts failing, the client currently keeps hammering it with requests, which makes a bad situation worse. I'd like us to add a circuit…