feat: 公开宿主组合加载 API、Forge 风格依赖版本区间与加载顺序、程序集解析策略

- ShrinkModComponentDiscovery.Discover 公开：只发现、不执行生命周期
- ShrinkModLoader.LoadComposed / ShrinkModCordisRuntime.ApplyComposedAsync：宿主提供元数据组合加载，支持纯数据包与 IShrinkModWrapper 公开真实实例
- 公开 TryAttachEventBusInstance，随生命周期逆操作释放
- 依赖新增 VersionRange（Maven/Forge 区间语法）与 Ordering（Before/After）
- AssemblyResolvePolicy 可限制跨模组程序集解析

Runtime/Context/ShrinkModComponent.cs

@@ -19,9 +19,8 @@ namespace ShrinkModFramework
         {
             _host = host ?? throw new ArgumentNullException(nameof(host));
             _source = source ?? throw new ArgumentNullException(nameof(source));
-            _inject = source.Info.Dependencies
-                .Where(dependency => !dependency.Optional)
-                .Select(dependency => ShrinkModContextHost.GetModKey(dependency.ModId))
+            _inject = host.GetPredecessors(source.Info.ModId)
+                .Select(ShrinkModContextHost.GetModKey)
                 .Distinct(StringComparer.Ordinal)
                 .ToArray();
             _provide = new[] { ShrinkModContextHost.GetModKey(source.Info.ModId) };
@@ -37,7 +36,8 @@ namespace ShrinkModFramework
             if (instance == null)
                 throw new InvalidOperationException($"Mod factory returned null: {_source.Info.ModId}");
 
-            var handle = new ShrinkModHandle(_source.Info, instance)
+            var publicInstance = instance is IShrinkModWrapper wrapper ? wrapper.PublicInstance : instance;
+            var handle = new ShrinkModHandle(_source.Info, publicInstance)
             {
                 Generation = _host.NextGeneration()
             };
@@ -70,7 +70,7 @@ namespace ShrinkModFramework
             IDisposable eventBinding = null;
             ctx.Effect(
                 () => eventBinding = ShrinkModOptionalRuntimeIntegration.TryAttachEventBusInstance(
-                    instance.GetType(), instance, handle.Info.ModId, _host.VerboseLogging),
+                    publicInstance?.GetType(), publicInstance, handle.Info.ModId, _host.VerboseLogging),
                 () =>
                 {
                     eventBinding?.Dispose();