feat(worker): IO Worker 分道(WK-1)

io worker 进程内按任务声明的 lane 分文件 / 网络 / 维护三条道,各自并发(缺省 2/4/1)、
各自排队;维护道在文件道或网络道有排队/运行时让路(连续 10 分钟放行一个),调度器内联的
清理/回填/保留期裁剪也走维护道。并发在 设置 → 自动化 → 高级 热生效,env 覆盖;旧
WORKER_CONCURRENCY 映射到网络道。运行状态页按道显示运行中/并发/排队。归属表写进
docs/runbook/dev.md,ci 与注册表逐项核对。

Co-Authored-By: Claude Opus 5.5 <[email protected]>

apps/server/src/modules/file-manager/index.ts

@@ -58,6 +58,7 @@ export function createFileManagerModule(overrides: FmOverrides = {}): ServerModu
         defineTask({
           name: "purgeTrash",
           version: 1,
+          lane: "maintenance",
           inputSchema: z.object({}).passthrough(),
           retryPolicy: { maximumAttempts: 3, initialInterval: "5s", backoffCoefficient: 2, maximumInterval: "60s" },
           handler: async (t) =>
@@ -70,6 +71,7 @@ export function createFileManagerModule(overrides: FmOverrides = {}): ServerModu
         defineTask({
           name: IDENTIFY_REMOTE_TASK,
           version: 1,
+          lane: "network",
           inputSchema: z.object({ body: FilesIdentifyRequest, actorId: z.string() }),
           retryPolicy: { maximumAttempts: 1 },
           handler: async (t) =>