Describe the problem

Some homeservers (for example tuwunel) struggle with latency with sending messages in encrypted group chats, and the /discardsession command usually fixes it. That command also fixes other encryption issues by syncing the keys from the homeserver (afaik). It's been implemented in many clients for example Element (and its forks), Nheko (named /rotate-megolm-session over there)

Describe the solution you'd like

A /discardsession command that discards the current megolm session and creates a new one, similar to Element.

Alternatives considered

No response

Additional context

No response