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/Metadata/ShrinkModInfo.cs

@@ -23,7 +23,9 @@ namespace ShrinkModFramework
             LoadOrder = loadOrder;
             EntryType = entryType;
             AutoApplyHarmonyPatches = autoApplyHarmonyPatches;
-            Dependencies = dependencies;
+            Dependencies = dependencies == null
+                ? Array.Empty<ShrinkModDependency>()
+                : new List<ShrinkModDependency>(dependencies).AsReadOnly();
         }
 
         public override string ToString() => $"{DisplayName} ({ModId}@{Version})";
@@ -35,20 +37,27 @@ namespace ShrinkModFramework
         public string ModId { get; }
         public string MinimumVersion { get; }
         public bool Optional { get; }
+        public string VersionRange { get; }
+        public ShrinkModDependencyOrdering Ordering { get; }
 
         public ShrinkModDependency(string modId, string minimumVersion, bool optional)
+            : this(modId, minimumVersion, optional, ShrinkModDependencyOrdering.After, null) { }
+
+        public ShrinkModDependency(string modId, string minimumVersion, bool optional,
+            ShrinkModDependencyOrdering ordering = ShrinkModDependencyOrdering.After, string versionRange = null)
         {
-            ModId = modId;
+            if (string.IsNullOrWhiteSpace(modId)) throw new ArgumentException("ModId must not be empty.", nameof(modId));
+            if (!Enum.IsDefined(typeof(ShrinkModDependencyOrdering), ordering))
+                throw new ArgumentOutOfRangeException(nameof(ordering));
+            ModId = modId.Trim();
             MinimumVersion = minimumVersion;
             Optional = optional;
+            VersionRange = versionRange ?? minimumVersion;
+            Ordering = ordering;
+            ShrinkModVersionRange.Parse(VersionRange);
         }
 
-        public override string ToString()
-        {
-            if (string.IsNullOrEmpty(MinimumVersion))
-                return Optional ? $"{ModId} (optional)" : ModId;
-
-            return Optional ? $"{ModId} >= {MinimumVersion} (optional)" : $"{ModId} >= {MinimumVersion}";
-        }
+        public override string ToString() =>
+            $"{ModId} {VersionRange ?? "*"} ({Ordering}{(Optional ? ", optional" : "")})";
     }
 }