docs(runtime): close projectile ownership

docs/architecture/acdream-architecture.md

@@ -236,7 +236,9 @@ src/
                                 collision receipts, bodies/hosts/worksets
       RuntimeRemotePhysicsUpdater.cs -> presentation-free remote simulation
       RuntimeOrdinaryPhysicsUpdater.cs -> presentation-free object simulation
-    -> J3–J4 and J5.1–J5.5 complete; J5.6 projectile runtime active
+      RuntimeProjectile.cs -> canonical projectile component/prediction owner
+      RuntimeProjectilePhysicsUpdater.cs -> presentation-free projectile simulation
+    -> J3–J4 and J5.1–J5.6 complete; J5.7 cleanup/closeout active
     -> may reference Core, Core.Net, Content, and Plugin.Abstractions only
     -> must never reference App, UI, Silk.NET, OpenAL, Arch, or ImGui
   
@@ -486,9 +488,9 @@ versions, and exact tombstones. `RuntimeEntityRecord` is presentation-free.
 an App record. `MaterializeLiveEntity` claims the Runtime local ID and creates
 one graphical `LiveEntityRecord` sidecar in `LiveEntityProjectionStore`, keyed
 by exact `RuntimeEntityKey` (local ID plus `INSTANCE_TS`). The sidecar owns the
-App animation, remote-motion, projectile, hydration, and effect presentation
-state. `RuntimeEntityRecord` deliberately still carries the canonical
-`PhysicsBody`/physics-host facts until their coherent J5 move.
+App animation, hydration, and effect/render presentation state.
+`RuntimeEntityRecord` owns the canonical `PhysicsBody`, physics host, remote
+motion, projectile component, clocks, state, and full cell.
 Live `PhysicsDesc` effect fields replace Setup defaults on that same exact
 sidecar; rebucketing never recreates it.
 
@@ -517,8 +519,11 @@ MTS/jump/AP cadence lives in Runtime (`aa3f4a60`). One
 graph, transition scratch, shadow registry, typed collision admissions,
 canonical body/host/remote components, ordinary/remote worksets, simulation,
 and full-cell commits. App supplies prepared collision and animation/shape
-inputs, then projects committed snapshots (`7e6033d0`). J5.6 next moves the
-projectile component and prediction lifecycle.
+inputs, then projects committed snapshots (`7e6033d0`). The same Runtime
+physics owner now owns the canonical projectile component, exact-key workset,
+prediction/correction lifecycle, retail projectile simulation, and cell
+commits. App resolves immutable Setup/DAT collision shape data and projects
+committed render, shadow, and effect-pose results only (`2aee3356`).
 
 `GpuWorldState` owns spatial buckets only and retains the exact projection key
 through loaded/pending movement, landblock retirement/reload, origin recenter,