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/ShrinkModDependencyGraph.cs

@@ -0,0 +1,59 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+
+namespace ShrinkModFramework
+{
+    internal static class ShrinkModDependencyGraph
+    {
+        internal static void ValidateVersion(ShrinkModInfo owner, ShrinkModDependency dependency, string actual)
+        {
+            if (!string.IsNullOrWhiteSpace(dependency.VersionRange) && !ShrinkModVersionRange.Parse(dependency.VersionRange).Contains(actual))
+                throw new InvalidOperationException($"Mod {owner.ModId} requires {dependency.ModId} in range {dependency.VersionRange}, but found {actual}.");
+        }
+
+        internal static IEnumerable<string> Predecessors(string id, IEnumerable<ShrinkModInfo> infos)
+        {
+            var map = infos.ToDictionary(info => info.ModId, StringComparer.Ordinal);
+            foreach (var owner in map.Values)
+                foreach (var dependency in owner.Dependencies)
+                {
+                    if (!map.ContainsKey(dependency.ModId)) continue;
+                    if (owner.ModId == id && dependency.Ordering == ShrinkModDependencyOrdering.After)
+                        yield return dependency.ModId;
+                    if (dependency.ModId == id && dependency.Ordering == ShrinkModDependencyOrdering.Before)
+                        yield return owner.ModId;
+                }
+        }
+
+        internal static IReadOnlyList<ShrinkModInfo> Order(IEnumerable<ShrinkModInfo> infos)
+        {
+            var map = infos.ToDictionary(info => info.ModId, StringComparer.Ordinal);
+            foreach (var owner in map.Values)
+                foreach (var dependency in owner.Dependencies)
+                {
+                    if (map.TryGetValue(dependency.ModId, out var target)) ValidateVersion(owner, dependency, target.Version);
+                    else if (!dependency.Optional)
+                        throw new InvalidOperationException($"Mod {owner.ModId} is missing required dependency {dependency.ModId}.");
+                }
+            var result = new List<ShrinkModInfo>();
+            var visiting = new HashSet<string>(StringComparer.Ordinal);
+            var visited = new HashSet<string>(StringComparer.Ordinal);
+            void Visit(string id)
+            {
+                if (visited.Contains(id)) return;
+                if (!visiting.Add(id)) throw new InvalidOperationException($"Circular mod dependency/Before/After ordering includes {id}.");
+                foreach (var predecessor in Predecessors(id, map.Values).OrderBy(value => value, StringComparer.Ordinal)) Visit(predecessor);
+                visiting.Remove(id); visited.Add(id); result.Add(map[id]);
+            }
+            foreach (var info in map.Values.OrderBy(info => info.LoadOrder).ThenBy(info => info.ModId, StringComparer.Ordinal)) Visit(info.ModId);
+            return result;
+        }
+
+        internal static bool SameMetadata(ShrinkModInfo a, ShrinkModInfo b) =>
+            a.ModId == b.ModId && a.DisplayName == b.DisplayName && a.Version == b.Version &&
+            a.LoadOrder == b.LoadOrder && a.EntryType == b.EntryType && a.AutoApplyHarmonyPatches == b.AutoApplyHarmonyPatches &&
+            a.Dependencies.Count == b.Dependencies.Count && a.Dependencies.Zip(b.Dependencies, (x, y) =>
+                x.ModId == y.ModId && x.VersionRange == y.VersionRange && x.Optional == y.Optional && x.Ordering == y.Ordering).All(equal => equal);
+    }
+}