Release 1.1.2 — the default path works end to end

Fix release for 1.1.1: the minimal path end to end, engine commands that
run on Godot, Unity and Unreal, hook warnings you can see, and verdicts
that say when they could not check. Details in CHANGELOG.md; upgrade
steps in UPGRADING.md (v1.1.1 → v1.1.2).

Fixes #67
Fixes #131

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01WuJn2FdynEybfL5KC697nJ

docs/engine-reference/unreal/plugins/gameplay-ability-system.md

@@ -176,6 +176,21 @@ void UMyAttributeSet::OnRep_Health(const FGameplayAttributeData& OldHealth) {
 // Implement other OnRep functions similarly...
 ```
 
+### Clamping Attributes
+
+Attribute Sets have no built-in clamping: the Data Table `Min Value` and
+`Max Value` columns have no effect. Clamp in the Attribute Set:
+- `PreAttributeChange()` is called just before any modification to an
+  attribute, and is the hook for rules like
+  `Health = Clamp(Health, 0, MaxHealth)` — its `NewValue` is mutable.
+- `PreAttributeBaseChange()` is called just before a change to an attribute's
+  **base** value when an aggregator exists, and `PostGameplayEffectExecute()`
+  just after a Gameplay Effect is executed to modify the base value — clamp
+  base-value changes from instant effects there.
+
+Stacking rules govern re-applications of the same Gameplay Effect; they do not
+bound one attribute pushed by different effects.
+
 ---
 
 ## Gameplay Abilities
@@ -391,4 +406,5 @@ void AMyCharacter::OnHealthChanged(const FOnAttributeChangeData& Data) {
 
 ## Sources
 - https://docs.unrealengine.com/5.7/en-US/gameplay-ability-system-for-unreal-engine/
+- Clamping: *Gameplay Attributes and Attribute Sets* https://dev.epicgames.com/documentation/en-us/unreal-engine/gameplay-attributes-and-attribute-sets-for-the-gameplay-ability-system-in-unreal-engine ; `UAttributeSet` API https://dev.epicgames.com/documentation/en-us/unreal-engine/API/Plugins/GameplayAbilities/UAttributeSet ; `PreAttributeChange` https://dev.epicgames.com/documentation/en-us/unreal-engine/API/Plugins/GameplayAbilities/UAttributeSet/PreAttributeChange
 - https://github.com/tranek/GASDocumentation (community guide)