feat(storage): 存储实例与 Alist 虚拟路径(迁移 0090、设置接口、注册表、vfs、健康检查)

- storage_instance 表 + secret 用途 storage_credential;令牌 / 密码 / 路径密码只写不读
- /storage-instances CRUD 与测试连接(版本、用户、根路径、容量);被库根引用不能删
- 远端路径 /@alist/<id>/<路径>,vfs 统一本地 / Alist 的 stat、列目录、建目录、读写、移动、删除
- 整理矩阵中涉及 Alist 的传输(storage/transfer.ts)与远端 ffprobe(直链只读头)
- 媒体库目录可登记在 Alist 上(不写哨兵,目录可访问即在线);健康检查列出存储实例

Co-Authored-By: Claude Opus 5.5 <[email protected]>
Claude-Session: https://claude.ai/code/session_01Cxwgnn2pbzQ7rXv3rq7fei

packages/contracts/src/api/instances.ts

@@ -1,6 +1,7 @@
 import { z } from "zod";
 import { IdParam } from "../common.ts";
 import * as instances from "../instances.ts";
+import * as storage from "../storage.ts";
 import { crud, del, ep, instanceTest, R } from "./shared.ts";
 
 export const instancesApi = {
@@ -54,6 +55,27 @@ export const instancesApi = {
     test: instanceTest("/media-server-instances/{id}/test", "测试媒体服务器连接"),
     remove: del("/media-server-instances/{id}", "删除媒体服务器实例"),
   },
+  storageInstances: {
+    ...crud(
+      "/storage-instances",
+      "存储实例",
+      {
+        row: storage.StorageInstance,
+        create: storage.StorageInstanceCreate,
+        update: storage.StorageInstanceUpdate,
+      },
+      R,
+    ),
+    test: ep({
+      method: "post",
+      path: "/storage-instances/{id}/test",
+      scope: "admin",
+      summary: "测试 Alist / OpenList 连接（版本、登录用户、根路径、容量）",
+      params: IdParam,
+      response: storage.StorageTestResult,
+    }),
+    remove: del("/storage-instances/{id}", "删除存储实例"),
+  },
   pathMappings: {
     ...crud(
       "/path-mappings",