fix(movement): invalidate burden on enchantment changes

docs/ISSUES.md

@@ -98,6 +98,43 @@ Copy this block when adding a new issue:
 
 ---
 
+## #272 — Strength enchantments do not invalidate burden
+
+**Status:** DONE — 2026-07-31 (implementation, automated gates, and user live
+buff/death gate)
+**Severity:** HIGH (movement state and retained HUD disagree with retail)
+**Filed:** 2026-07-31
+**Component:** player qualities / enchantments / burden
+
+**Symptom:** while overburdened, casting a Strength spell did not reduce the
+burden state until the base Strength attribute changed. Dying purged the
+Strength spell but did not restore the overburdened state.
+
+**Root cause:** `LiveSessionEventRouter.RecomputeBurden` read raw
+`AttributeValue.Current` and subscribed only to base Strength/object-table
+changes. The indicator bar and inventory meter had the same raw-Strength
+composition, and the inventory meter did not observe enchantment changes.
+Retail `CACQualities::InqLoad @ 0x0058F130` calls
+`CACQualities::InqAttribute @ 0x00591A00`, which applies
+`CACQualities::EnchantAttribute @ 0x00594570`; every load query therefore uses
+effective Strength.
+
+**Fix:** all three consumers now read
+`LocalPlayerState.GetEffectiveAttribute(Strength)`. The Runtime burden owner,
+indicator bar, and inventory meter subscribe to the canonical
+`Spellbook.EnchantmentsChanged` edge, covering add, remove, expiration,
+dispel, and death purge through one path. Regression tests pin both
+buff-to-unburdened and purge-to-overburdened transitions without any base
+attribute update.
+
+**Acceptance:** overload a character, cast a Strength spell, and observe the
+burden icon/meter plus movement update immediately. Die while the spell is
+active and observe the spell purge restore the overburdened icon/meter and
+movement immediately. **Passed live 2026-07-31:** the user confirmed the
+burden state now updates correctly.
+
+---
+
 ## #271 — Stair-side collision reverses uphill movement and rapidly slides the player down
 
 **Status:** DONE — 2026-07-31 (implementation + user live gate)