Patch Notes: Server load fix

Online services

• The account server has been overloaded since this afternoon, so town seats, homes, the market and other online menus have been slow to load or failing. The heaviest read, the town seats list, no longer runs on the main database, which should bring them back.

What's Changed

• SEAT-REPLICA: the seats' witness rows are read off a D1 replica, not the overloaded primary by @Lattymoy in #886

Full Changelog: app-v0.1.8519...app-v0.1.8521