Throttle lock is a forward floor on the solve; allocation moves after the performance update

The lock stops being an intent rewrite in Ship.Update: ThrustAllocator.Allocate takes forwardFloor, which ignores the
stick, asks full forward and holds every column with y > 0 at full (ruling overdrive-forward-floor). Ship allocates in
Entity's new UpdateThrottles phase, after every item's UpdatePerformance and before the power bus and Execute, so
liveness and thrust are the ones Execute acts on (finding liveness-read-before-performance).
Tests follow in the next commits; the test project still compiles, new behaviour is untested here.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

Assets/Scripts/ServerShared/Entity.cs

@@ -1373,6 +1373,10 @@ public abstract class Entity
                     yield return b;
     }
 
+    // The phase between the items' performance update and the power bus: what an entity commands its items to do this
+    // tick, read from the same liveness and stats Execute then acts on. Ship's allocation lives here.
+    protected virtual void UpdateThrottles() { }
+
     public virtual void Update(float delta)
     {
         TurnRate = 0;
@@ -1402,6 +1406,7 @@ public abstract class Entity
         UpdateTemperature(delta);
 
         foreach (var item in _orderedEquipment) item.UpdatePerformance();
+        UpdateThrottles();
 
         if (_active)
         {