chore(prep): shared groundwork for the parallel task batch

多 agent 并行批次的协调提交（消除全部共享文件冲突面）：
- 迁移 0004：id_session + ob_event 两表（T3/T4 用，任务不再写迁移）
- ORM：UserSession / ObEvent；错误码：九个新码（40xxx/60006，含 meta）
- 配置：四档 tiers / refresh TTL / 任务奖励注册表 / 埋点上限 / COS 直传全套
- 骨架：packages/analytics + packages/storage + events/uploads 空路由（已注册）
- deps：AnalyticsServiceDep / StorageServiceDep；DailyBudgetGuard 接收 tiers
- uv add cos-python-sdk-v5；import-linter/CI/Makefile 纳入两个新包

apps/api/main.py

@@ -12,7 +12,7 @@ from contextlib import asynccontextmanager
 from fastapi import FastAPI
 
 from apps.api.deps import build_llm_gateway
-from apps.api.routers import agent, auth, health, quota, tasks
+from apps.api.routers import agent, auth, events, health, quota, tasks, uploads
 from packages.shared.config import Settings, get_settings
 from packages.shared.db import dispose_engine
 from packages.shared.handlers import install_exception_handlers
@@ -69,7 +69,8 @@ def create_app(settings: Settings | None = None) -> FastAPI:
     setup_tracing(app, cfg)
 
     app.include_router(health.router)
-    for router in (auth.router, agent.router, quota.router, tasks.router):
+    routers = (auth.router, agent.router, quota.router, tasks.router, events.router, uploads.router)
+    for router in routers:
         app.include_router(router, prefix=cfg.api_prefix)
 
     return app