feat(phase2e-2): media-server Task 0/1/2 落地 + 代码审查修复

本次提交一次性落盘 Phase 2e-2 的 Task 0（PoC Spike）、Task 1（骨架 + Fastify 5 升级）
和 Task 2（9 个内部 REST API + code-reviewer 审查修复），覆盖 media-server 子项目
从零到可用的全部工作。

【Task 0 - PoC Spike】
- media-server/poc/：Node + mediasoup + fastify-websocket + 前端 mediasoup-client
- Playwright 双 tab 自动化验证 2 人会议：4 transports / 4 producers / 4 consumers / RSS 61MB
- media-server/docs/poc-notes.md 归档 7 项关键坑 + 启动步骤 + Task 1/2/9 复用映射
- 锁定技术栈：mediasoup + fastify + mediasoup-client，不改用 livekit-server

【Task 1 - 骨架 + Fastify 5 升级】
- 依赖版本：mediasoup@3.19.0 + fastify@5.8.5 + fastify-plugin@5.1.0
           + @fastify/sensible@6.0.4 + @fastify/websocket@11.2.0
           + pino@9.3.2 + zod@3.23.8
- src 五件套：app.ts / config.ts / utils/logger.ts / mediasoup/worker.ts
             / middlewares/internal-auth.ts
- /healthz + /readyz + /internal/info 三端点实测通过
- X-Internal-Token 鉴权用 timingSafeEqual 防侧信道
- mediasoup Worker died 指数退避自愈通过 kill -9 验证
- 多阶段 Dockerfile：非 root + curl HEALTHCHECK + 暴露 40000-40199 UDP/TCP
- Fastify 4 → 5 升级：loggerInstance: logger 消灭两个 pino 实例

【Task 2 - 9 个内部 REST API + 审查修复】
接口全部挂 /internal/v1/* 前缀，覆盖 Router/Transport/Producer/Consumer 完整生命周期：
- POST /routers, DELETE /routers/:id
- POST /transports, POST /transports/:id/connect
- POST /producers, DELETE /producers/:id
- POST /consumers, POST /consumers/:id/resume, DELETE /consumers/:id

工程特性：
- zod 手动 parse + 全局 errorHandler（不引入 fastify-type-provider-zod 避免
  zod v4 依赖冲突）
- AppError 统一错误码（NOT_FOUND/CONFLICT/CAN_NOT_CONSUME/ROUTER_LIMIT_EXCEEDED
  /MEDIASOUP_ERROR/VALIDATION_ERROR/UNAUTHORIZED/INTERNAL_ERROR）
- 所有资源用 Map + observer.once('close') 自清理，Consumer 监听 producerclose 级联关闭
- Consumer 强制 paused:true 创建，/resume 独立接口
- Transport direction 强约束：recv 拒 produce、send 拒 consume

code-reviewer 子代理审查"有条件通过"，同步修复：
- M1 _clearXxxMap 新增 src/utils/test-guard.ts#assertTestOnly 守卫（生产误调用抛错）
- M2 新增 src/schemas/rtp.ts 对 rtpParameters / rtpCapabilities 做 codecs 浅层校验
  （mimeType/clockRate/payloadType 必填、codecs ≥1），消除 as unknown as 双跳断言
- m1 connectTransport 改乐观锁：先置位再 await，失败回退
- m2 改读 consumer.producerPaused（更符合 mediasoup 语义）
- m3 producerclose 改为 once（风格一致）
- m5 internal-auth 改为反向白名单 PRIVATE_PATH_PREFIXES = ['/internal/']

验证：
- typecheck / lint 0 错误
- vitest：65 passed / 8 spec 文件
- 覆盖率 stmts 82.87% / branches 75.83% / funcs 91.3% / lines 82.87%
- 9 接口 happy path + 6 类错误路径 curl 手测全部按预期返回

【文档同步】
- CURRENT_STATUS.md +232 行：新增 Task 0/1/2 完整记录 + 代码审查修复章节 + 延后清单
- project-context.mdc：Task 0/1/2 状态同步
- phase2e-2-design.md +20 行：Fastify 5 升级相关决策记录
- phase2e-2-implementation.plan.md +117 行：Task 0/1/2 实际产出 + 修复记录

余下 Minor/Nits（m4/m6~m10/n1~n10）登记至 Task 16 收尾清单一次性清扫。

Made-with: Cursor

media-server/src/routes/consumer.route.ts

@@ -0,0 +1,31 @@
+import type { FastifyInstance } from 'fastify';
+import type { RtpCapabilities } from 'mediasoup/types';
+
+import { consumerIdParamSchema, createConsumerBodySchema } from '../schemas/consumer.schema.js';
+import { closeConsumer, createConsumer, resumeConsumer } from '../services/consumer.service.js';
+
+export async function consumerRoutes(app: FastifyInstance): Promise<void> {
+  app.post('/consumers', async (request, reply) => {
+    const body = createConsumerBodySchema.parse(request.body);
+    const result = await createConsumer({
+      routerId: body.routerId,
+      transportId: body.transportId,
+      producerId: body.producerId,
+      rtpCapabilities: body.rtpCapabilities as RtpCapabilities,
+    });
+    reply.code(201);
+    return result;
+  });
+
+  app.post('/consumers/:id/resume', async (request) => {
+    const { id } = consumerIdParamSchema.parse(request.params);
+    await resumeConsumer(id);
+    return { ok: true as const };
+  });
+
+  app.delete('/consumers/:id', async (request) => {
+    const { id } = consumerIdParamSchema.parse(request.params);
+    await closeConsumer(id);
+    return { ok: true as const };
+  });
+}

media-server/src/routes/producer.route.ts

@@ -0,0 +1,25 @@
+import type { FastifyInstance } from 'fastify';
+import type { RtpParameters } from 'mediasoup/types';
+
+import { createProducerBodySchema, producerIdParamSchema } from '../schemas/producer.schema.js';
+import { closeProducer, createProducer } from '../services/producer.service.js';
+
+export async function producerRoutes(app: FastifyInstance): Promise<void> {
+  app.post('/producers', async (request, reply) => {
+    const body = createProducerBodySchema.parse(request.body);
+    const result = await createProducer({
+      transportId: body.transportId,
+      kind: body.kind,
+      rtpParameters: body.rtpParameters as RtpParameters,
+      appData: body.appData,
+    });
+    reply.code(201);
+    return result;
+  });
+
+  app.delete('/producers/:id', async (request) => {
+    const { id } = producerIdParamSchema.parse(request.params);
+    await closeProducer(id);
+    return { ok: true as const };
+  });
+}

media-server/src/routes/router.route.ts

@@ -0,0 +1,19 @@
+import type { FastifyInstance } from 'fastify';
+
+import { createRouterBodySchema, routerIdParamSchema } from '../schemas/router.schema.js';
+import { closeRouter, createRouter } from '../services/router.service.js';
+
+export async function routerRoutes(app: FastifyInstance): Promise<void> {
+  app.post('/routers', async (request, reply) => {
+    const { roomCode } = createRouterBodySchema.parse(request.body);
+    const result = await createRouter(roomCode);
+    reply.code(201);
+    return result;
+  });
+
+  app.delete('/routers/:routerId', async (request) => {
+    const { routerId } = routerIdParamSchema.parse(request.params);
+    await closeRouter(routerId);
+    return { ok: true as const };
+  });
+}

media-server/src/routes/transport.route.ts

@@ -0,0 +1,28 @@
+import type { FastifyInstance } from 'fastify';
+
+import {
+  connectTransportBodySchema,
+  createTransportBodySchema,
+  transportIdParamSchema,
+} from '../schemas/transport.schema.js';
+import { connectTransport, createWebRtcTransport } from '../services/transport.service.js';
+
+export async function transportRoutes(app: FastifyInstance): Promise<void> {
+  app.post('/transports', async (request, reply) => {
+    const body = createTransportBodySchema.parse(request.body);
+    const result = await createWebRtcTransport({
+      routerId: body.routerId,
+      userId: body.userId,
+      direction: body.direction,
+    });
+    reply.code(201);
+    return result;
+  });
+
+  app.post('/transports/:id/connect', async (request) => {
+    const { id } = transportIdParamSchema.parse(request.params);
+    const { dtlsParameters } = connectTransportBodySchema.parse(request.body);
+    await connectTransport({ transportId: id, dtlsParameters });
+    return { ok: true as const };
+  });
+}