Issue 1: How many channels can be stored, and for how long?
There’s no time limit for storing channel list data, but there’s a cap of 1,000 channels. If you create more than 1,000 channels, only the latest 1,000 will be returned.
Issue 2: If I delete a pinned channel and recreate it, will it remain pinned?
The pinned status won’t be lost even if the channel is deleted. When you recreate the channel, it will retain its previous pinned status.