fix(movement): invalidate burden on enchantment changes

docs/research/2026-07-30-stat-coupled-movement-pseudocode.md

@@ -54,11 +54,16 @@ InqLoad(this, &loadOut):
     return 1   // always succeeds for CACQualities (has vtable)
 ```
 
-This EXACTLY matches acdream's existing `IndicatorBarController.UpdateBurden()`
-/ `InventoryController.RefreshBurden()` pattern (Strength attribute + prop
-0xE6 aug + prop 5 EncumbranceVal, falling back to `SumCarriedBurden` when the
-wire value is absent) — already ported, already correct, already tested via
-the UI. **`AcDream.Core.Items.BurdenMath`
+The property/capacity shape matches acdream's
+`IndicatorBarController.UpdateBurden()` /
+`InventoryController.RefreshBurden()` pattern (Strength attribute + prop 0xE6
+aug + prop 5 EncumbranceVal, falling back to `SumCarriedBurden` when the wire
+value is absent). A 2026-07-31 connected gate exposed one omitted retail
+detail: `InqAttribute` returns the enchantment-adjusted attribute, while all
+three acdream burden consumers still read raw `AttributeValue.Current`.
+Issue #272 corrects them to `LocalPlayerState.GetEffectiveAttribute(Strength)`
+and invalidates burden on the canonical `Spellbook.EnchantmentsChanged` edge.
+**`AcDream.Core.Items.BurdenMath`
 (`EncumbranceCapacity`/`LoadRatio`/`LoadModifier`) is the SAME formulas at
 the SAME addresses.** P1's `EncumbranceSystem` (Physics-namespaced, for
 citation clarity next to `MovementSystem`) delegates to `BurdenMath` rather
@@ -317,8 +322,10 @@ Runtime (AcDream.Runtime, presentation-free):
     - onSkillsUpdated callback -> character.Character.UpdateMovementSkillBase(...)
     - NEW: inventory.Objects.{ObjectAdded,ObjectUpdated,ObjectRemoved,ObjectMoved,
       ContainerContentsReplaced,Cleared} + LocalPlayer.AttributeChanged(Strength)
+      + Spellbook.EnchantmentsChanged
       -> recompute burden (Strength + prop 0xE6 aug + prop 5 EncumbranceVal,
          SAME shape as IndicatorBarController.UpdateBurden/InventoryController.RefreshBurden)
+         using effective/enchantment-adjusted Strength
       -> character.Character.MovementSkills.UpdateBurden(ratio)
     - NEW: character.Character.LocalPlayer.Changed(VitalKind.Stamina)
       -> character.Character.MovementSkills.UpdateStamina(current)