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/Integration/ShrinkModOptionalRuntimeIntegration.cs

@@ -6,9 +6,9 @@ using UnityEngine;
 
 namespace ShrinkModFramework
 {
-    internal static class ShrinkModOptionalRuntimeIntegration
+    public static class ShrinkModOptionalRuntimeIntegration
     {
-        public static IDisposable RegisterModInstance(IShrinkMod modInstance, ShrinkModInfo modInfo,
+        internal static IDisposable RegisterModInstance(IShrinkMod modInstance, ShrinkModInfo modInfo,
             bool verboseLogging)
         {
             if (modInstance == null || modInfo == null)
@@ -21,11 +21,12 @@ namespace ShrinkModFramework
             return eventBinding;
         }
 
-        public static void RefreshGlobalBindings(bool verboseLogging)
+        internal static void RefreshGlobalBindings(bool verboseLogging)
         {
             TryRefreshNetworkEventBusBridge(verboseLogging);
         }
 
+        /// <summary>绑定生成的实例订阅。调用方须 Dispose 返回值，或通过 context.EffectInverse 登记释放。</summary>
         public static IDisposable TryAttachEventBusInstance(Type modType, object modInstance,
             string modId, bool verboseLogging)
         {