Solid Trifecta + Kamal + Postgres don’t play along nice, this is the way to fix it

When you deploy a fresh Rails 8 app with the Solid “trifecta” (Solid Cache, Solid Queue, Solid Cable), you actually have four database connections in production: primary, cache, queue, and cable. If only `DATABASE_URL` is set, the other three try to connect via the default...