Anti-rollback notes: Linux systemd unit (#996)

Sharing what worked on our test world this week. We keep configs in git and treat live changes as a hotfix branch. Client target: 12.x/13.x OTC builds with our custom modules disabled for the repro. Has anyone stress-tested this with 200+ CCU?

Consider feature-flagging it for premium only during the first week.

For Windows hosts, mark the service recovery options or it will not auto-restart.

Try indexing the player storage lookups; it helped our spawn scripts.

We documented a similar path in our ops notes last month.