int32 TotalSimulationTime
How much simulation time has ran up until this point. This is "Server time", e.g, everyone agrees on this time and it can be used for timers/cooldowns etc in the simulation code. It can be stored in sync/aux state and reconciles pred vs authority. This will be 0 the first time ::SimulationTick runs (globally for fix tick, local tick and per-sim for remote independent sims)