getEntityTextAsString is used in two places:

1. Notifs, where we potentially need to resolve robotext with FC users in it
2. Determining the name of a pending thread. If somebody is creating a pending thread from a robotext that has FC users in it, we want to resolve the FC usernames

Depends on D11880

I tested notifs generated on the keyserver and delivered to an Android device, and confirmed that they resolved Farcaster usernames properly