Add API Endpoint for Bots to Delete All Messages in a Channel

[ziomek64]

Allow bots to perform a bulk deletion of all messages in a channel through a single command or API call, rather than deleting messages individually or in small batches.

Problem:
Currently, Discord bots can only delete messages using:

The Bulk Delete, which is limited to messages younger than 14 days, and

Individual message deletions, which are inefficient, rate-limited, and resource-intensive when clearing large channels.

Benefits:

Greatly simplifies cleanup automation for bots and moderators, where keeping Channel ID or channel override permissions is crucial.

[Sacul0457]

This is just really really really bad for soooo many reasons, might as well delete the channel atp.

where keeping Channel ID or channel override permissions is crucial.

Then just save those channel overwrites and replace them with the new channels or smth. Not sure why keeping channel ID is crucial

[ziomek64]

@Sacul0457 Could you clarify those reasons? I'd like to know. As for channel is importance, some bots save channel ids or whatever in database

[SinisterRectus]

Never forget #208

We'll be introducing a proper "purge channel" endpoint at some point in the future - which will be able to delete old messages without creating excessive table fragmentation (we already have a plan on how to do so).