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

pyproject.toml

@@ -20,6 +20,7 @@ dependencies = [
     "structlog>=24.4",
     "orjson>=3.10",
     "prometheus-client>=0.21",
+    "cos-python-sdk-v5>=1.9.44",
 ]
 
 [project.optional-dependencies]
@@ -110,7 +111,7 @@ type = "layers"
 layers = [
     "apps",
     "packages.agent | packages.report | packages.tryon | packages.wardrobe",
-    "packages.identity | packages.billing | packages.task | packages.compliance | packages.notify",
+    "packages.identity | packages.billing | packages.task | packages.compliance | packages.notify | packages.analytics | packages.storage",
     "packages.kb | packages.retrieval | packages.rules | packages.memory | packages.profile",
     "packages.llm",
     "packages.shared",