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

.claude/rules/engine-code.md

@@ -1,6 +1,8 @@
 ---
 paths:
   - "src/core/**"
+  - "Assets/**/{Core,core}/**/*.cs"
+  - "Source/**/{Core,core}/**/*.{h,cpp}"
 ---
 
 # Engine Code Rules
@@ -17,7 +19,7 @@ paths:
 
 ## Examples
 
-**Correct** (zero-alloc hot path):
+**Correct** (zero-alloc hot path) — Godot:
 
 ```gdscript
 # Pre-allocated array reused each frame
@@ -28,6 +30,29 @@ func _physics_process(delta: float) -> void:
     _spatial_grid.query_radius(position, radius, _nearby_cache)
 ```
 
+Unity:
+
+```csharp
+private readonly Collider[] _nearbyCache = new Collider[64];  // allocated once
+
+void FixedUpdate()
+{
+    int count = Physics.OverlapSphereNonAlloc(transform.position, radius, _nearbyCache);
+}
+```
+
+Unreal:
+
+```cpp
+// TArray member, reserved once; Reset() keeps the allocation
+void UProximityComponent::TickComponent(float DeltaTime, ELevelTick TickType,
+                                        FActorComponentTickFunction* ThisTickFunction)
+{
+    NearbyCache.Reset();
+    SpatialGrid->QueryRadius(GetComponentLocation(), Radius, NearbyCache);
+}
+```
+
 **Incorrect** (allocating in hot path):
 
 ```gdscript