Patch Notes: Online steadier when the servers are busy; decorations come back

Online

• Fixed the account server falling over again, which left homes and yards without their decorations. When the server slowed down, every game asked it again within seconds, and that kept it down. Games now wait longer after each failed ask, so a busy minute passes instead of turning into an outage.
• Signing into a room after a slow server answer no longer asks for a second sign-in ticket, so you reconnect sooner.

What's Changed

• STORM-SHED: the account server's second overload - retries that never back off, and the reads they multiplied by @Lattymoy in #648
• STORM-SHED gates: Testing.md's count, two mutants re-aimed, PROF7's index list (unblocks #648's deploy) by @Lattymoy in #649

Full Changelog: app-v0.1.6618...app-v0.1.6625