Make tick smoothers multithreaded

[belplaton]

Tick Smoothing: execution refactor (single-thread -> jobified)

This PR changes how the existing tick smoothing runs: from per-object, main-thread execution to a centralized jobified pipeline in TickSmoothingManager. The core smoothing idea remains the same; the implementation/dispatch model is different.

Key differences (before vs after)

• Before: each TickSmootherController subscribed to TimeManager and ran smoothing on the main thread.
  After: the controller only Register/Unregisters; all event wiring (OnUpdate/OnPreTick/OnPostTick, RTT, prediction replay) and execution are handled in TickSmoothingManager.

• Before: per-object state lived in controller/smoother instances.
  After: state is stored in the manager as indexed Native/SoA containers (masks like canSmooth/useOwner/objectReconciling/..., realtime interpolation/multipliers, move-rates, snapshots, and a per-index TickTransformProperties queue).

• Multithreading approach: work is expressed as explicit job chains with JobHandle dependencies (no per-object main-thread loops).

  • Transform work uses IJobParallelForTransform over TransformAccessArray (_graphicalTaa, _targetTaa, _trackerTaa).
  • Non-transform work uses IJobParallelFor with batching (ComputeBatchSize based on JobsUtility.JobWorkerCount).

• Dispatch pattern: “payload + executeMask”. Jobs populate payload arrays (move, discard, set rates, snap, teleport, enqueue/clear, replay modify), and subsequent jobs apply only entries where executeMask != 0.

• Tick buffer: the per-object tick buffer is now job-friendly via StripedRingQueue<TickTransformProperties> (one ring queue per index/stripe). Queue trimming (limits + required headroom over interpolation) is performed in DiscardExcessive... as part of job chains.

Phase breakdown (job chains)

• OnPreTick

  • Update fast masks on main thread
  • PreTickMarkJob → discard → teleport (and queue clear) → PreTickCaptureGraphicalJob → Complete()

• OnPostTick

  • CaptureLocalTargetJob → PostTickCaptureTrackerJob → PostTickJob (produces snap/enqueue payloads)
  • discard → snap → add/enqueue → Complete()

• OnUpdate

  • UpdateJob (move payload) → MoveToTargetJob (moves graphical; may trigger set rates/multiplier/clear) → Complete()

• RTT / prediction replay

  • Separate job chains update realtime interpolation and perform ModifyTransformProperties after prediction replay.

Additional changes

• Added MovementSettings.UseLocalSpace to select local/world space for position/rotation smoothing.
• Updated .asmdef dependencies for Jobs/Burst/Mathematics/Collections.

[FirstGearGames]

I'd like to get this in but given the significant amount of change and complexity I do not want to merge this over official files. There's not enough dev time to move-around to verify/maintain all of these changes.

As mentioned via DM though, I still do want to see this in so you can benefit from them, as well anyone else that wishes to try these changes out. We talked about wrapping everything in a define.

Can you wrap the original files in a preprocessors please
#if !THREADED_TICKSMOOTHERS
//original file here
#endif

then make a new file for each you modified in a subfolder... eg:

FishNet/Components/Smoothing/TickSmoother.cs //original
FishNet/Components/Smoothing/Threaded/TickSmoother.cs //yours.

and in your files wrap in the preprocessors
#if THREADED_TICKSMOOTHERS
//your file here.
#endif

[belplaton]

All done, I guess @FirstGearGames

[FirstGearGames]

merged!