fix(anim): Phase L.1c match MoveTo run speed

Retail MovementManager::PerformMovement (0x00524440) reads MoveTo speed and runRate from the packet, MovementParameters::UnPackNet (0x0052AC50) defines the layout, and CMotionInterp::apply_run_to_command (0x00527BE0) multiplies RunForward by runRate. Parse those fields for UpdateMotion/CreateObject, seed server-controlled MoveTo locomotion with the retail speed multiplier, and avoid overriding active monster MoveTo with sparse UpdatePosition-derived velocity.

tests/AcDream.Core.Tests/Physics/ServerControlledLocomotionTests.cs

@@ -16,6 +16,32 @@ public sealed class ServerControlledLocomotionTests
         Assert.Equal(1.0f, plan.SpeedMod);
     }
 
+    [Fact]
+    public void PlanMoveToStart_AppliesRetailRunRate()
+    {
+        var plan = ServerControlledLocomotion.PlanMoveToStart(
+            moveToSpeed: 1.25f,
+            runRate: 1.5f,
+            canRun: true);
+
+        Assert.True(plan.IsMoving);
+        Assert.Equal(MotionCommand.RunForward, plan.Motion);
+        Assert.Equal(1.875f, plan.SpeedMod);
+    }
+
+    [Fact]
+    public void PlanMoveToStart_UsesWalkWhenRunDisallowed()
+    {
+        var plan = ServerControlledLocomotion.PlanMoveToStart(
+            moveToSpeed: 0.75f,
+            runRate: 2.0f,
+            canRun: false);
+
+        Assert.True(plan.IsMoving);
+        Assert.Equal(MotionCommand.WalkForward, plan.Motion);
+        Assert.Equal(0.75f, plan.SpeedMod);
+    }
+
     [Fact]
     public void PlanFromVelocity_StopsBelowRetailNoiseThreshold()
     {