Messages don't appear immediately after being sent

## Issue Summary
The message fetching mechanism is buggy. Messages can be sent fine (as evidenced by pointing the element.app.codecollective.us client to matrix.app.codecollective.us), but they do not update in our client appropriately. I had this working better at one point but lost the code. The salient document is the Matrix Specification
[Client-Server API](https://spec.matrix.org/v1.13/client-server-api/)

### Steps to Reproduce
cd webapp
npm run dev
Navigate in your browser to https://localhost:5173/
Sign in, creating an account if necessary (persistent)
Click the chat icon, or navigate to /chat
Authorize Matrix, if necessary
Send a message to the Arkavo Admins channel (if you see it. otherwise this is another bug; you may need to join the room manually)

### Actual Result
The Messages view doesn't immediately update to show the message you've sent

### Expected Result
The message you sent should immediately appear on the message list