PMP does not work in encrypted rooms

[poolcritter]

Describe the bug

PMPs are not displayed when present in a decrypted message.

Reproduction

1. Enter an encrypted room
2. Send a message with a PMP (e.g. /rawmsg {"msgtype":"m.text","body":"meow!","com.beeper.per_message_profile":{"displayname":"meower"}})
3. Notice the PMP briefly appear while the message is sending
4. Notice the fact that the message is no longer using the PMP
5. RMB→View Source to note that the com.beeper.per_message_profile key is in fact present

Compare this behavior to an unencrypted room.

Expected behavior

The per-message profile should be rendered regardless of whether the room is encrypted.

Platform and versions

- OS: Linux x86_64
- Browser: Mozilla/5.0 (X11; CrOS x86_64 14541.0.0) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/145.0.0.0 Safari/537.36
- Sable: v1.9.3-dev (fbe60f1)

Additional context

No response

[Astralchroma]

This needs to be reopened, it's not fixed.

[Astralchroma]

To elaborate after some testing, PMP messages in encrypted channels from other users will show with the base profile until the channel is reloaded.