feat(eventbus): add platform runtimes and benchmarks

Add the Entities NativeQueue adapter, standalone .NET runtime and source generator, reproducible smoke coverage, and Unity benchmark assets for EventBus 2.0.

Assets/Modules/ShrinkEventBus.Entities/Tests/ShrinkEcsEventQueueTests.cs

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+#nullable enable
+
+using System;
+using NUnit.Framework;
+using Unity.Burst;
+using Unity.Collections;
+using Unity.Jobs;
+
+namespace ShrinkEventBus.Entities.Tests
+{
+    internal struct EcsPingEvent : IShrinkEvent
+    {
+        public int Value;
+    }
+
+    internal sealed class EcsPingSubscriber : IShrinkGeneratedSubscriber
+    {
+        public int Sum { get; private set; }
+
+        public IDisposable AttachGenerated(IShrinkBusResolver resolver, ShrinkBusKey? defaultBus = null)
+        {
+            return ShrinkGeneratedBinding.Subscribe<EcsPingEvent>(resolver, defaultBus,
+                string.Empty, this, OnPing, ShrinkEventPriority.Normal, 0, false);
+        }
+
+        private void OnPing(EcsPingEvent value) => Sum += value.Value;
+    }
+
+    [BurstCompile]
+    internal struct PostPingJob : IJob
+    {
+        public ShrinkEcsEventWriter<EcsPingEvent> Writer;
+
+        public void Execute()
+        {
+            Writer.Post(new EcsPingEvent { Value = 11 });
+        }
+    }
+
+    public sealed class ShrinkEcsEventQueueTests
+    {
+        [Test]
+        public void NativeWriterPlaybackUsesSameBusChannel()
+        {
+            using var host = new ShrinkEventBusHost();
+            var bus = host.CreateBus(ShrinkBusKey.World("tests"), ShrinkBusOptions.Inline());
+            var subscriber = new EcsPingSubscriber();
+            using var binding = host.Attach(subscriber, ShrinkBusKey.World("tests"));
+            using var queue = new ShrinkEcsEventQueue<EcsPingEvent>(Allocator.TempJob);
+
+            queue.Writer.Post(new EcsPingEvent { Value = 2 });
+            queue.Writer.Post(new EcsPingEvent { Value = 5 });
+            var played = queue.Playback(bus);
+
+            Assert.AreEqual(2, played);
+            Assert.AreEqual(7, subscriber.Sum);
+        }
+
+        [Test]
+        public void BurstJobWritesThenPlaybackUsesManagedBus()
+        {
+            using var host = new ShrinkEventBusHost();
+            var bus = host.CreateBus(ShrinkBusKey.World("burst-tests"), ShrinkBusOptions.Inline());
+            var subscriber = new EcsPingSubscriber();
+            using var binding = host.Attach(subscriber, ShrinkBusKey.World("burst-tests"));
+            using var queue = new ShrinkEcsEventQueue<EcsPingEvent>(Allocator.TempJob);
+            var job = new PostPingJob { Writer = queue.Writer };
+
+            job.Schedule().Complete();
+            var played = queue.Playback(bus);
+
+            Assert.AreEqual(1, played);
+            Assert.AreEqual(11, subscriber.Sum);
+        }
+    }
+}

Assets/Modules/ShrinkEventBus.Entities/Tests/ShrinkEcsEventQueueTests.cs.meta

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Assets/Modules/ShrinkEventBus.Entities/Tests/ShrinkEventBus.Entities.Tests.asmdef

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+{
+  "name": "ShrinkEventBus.Entities.Tests",
+  "rootNamespace": "ShrinkEventBus.Entities.Tests",
+  "references": [
+    "ShrinkEventBus.Entities.Runtime",
+    "ShrinkEventBus.Runtime",
+    "Unity.Burst",
+    "Unity.Collections",
+    "Unity.Jobs",
+    "UniTask",
+    "UnityEngine.TestRunner",
+    "UnityEditor.TestRunner"
+  ],
+  "includePlatforms": ["Editor"],
+  "excludePlatforms": [],
+  "allowUnsafeCode": false,
+  "overrideReferences": false,
+  "autoReferenced": false,
+  "defineConstraints": ["UNITY_INCLUDE_TESTS"]
+}

Assets/Modules/ShrinkEventBus.Entities/Tests/ShrinkEventBus.Entities.Tests.asmdef.meta

@@ -0,0 +1,7 @@
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