实现下单任务网关与本地 worker

按 docs/order-gateway.md 落地：第三个部署单元 app.gateway（:31109）承担任务队列
+ 状态镜像；本地 worker 在 app.trading.worker 内，按 RAKUTEN_ORDER_GATEWAY_URL
决定是否启动。规格 §5 最关键约束已守：租约过期绝不自动重投，恢复只能 reclaim，
worker 收到 lease_count>1 时先核对站点订单。

站点交互（加购/下单/付款/订单列表反查）按规格 §10 留接口缝，site_interact.py
全部 NotImplementedError，verify.py 恒返回 unknown——等真实账号实测后再填，
不写猜测的提交逻辑。

310 个测试全绿，覆盖规格 §9 验收清单 12 条；架构测试守住三方互不 import。

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

uv.lock

@@ -6,6 +6,15 @@ resolution-markers = [
     "python_full_version < '3.14'",
 ]
 
+[[package]]
+name = "aiosqlite"
+version = "0.22.1"
+source = { registry = "https://mirrors.huaweicloud.com/repository/pypi/simple" }
+sdist = { url = "https://mirrors.huaweicloud.com/repository/pypi/packages/4e/8a/64761f4005f17809769d23e518d915db74e6310474e733e3593cfc854ef1/aiosqlite-0.22.1.tar.gz", hash = "sha256:043e0bd78d32888c0a9ca90fc788b38796843360c855a7262a532813133a0650" }
+wheels = [
+    { url = "https://mirrors.huaweicloud.com/repository/pypi/packages/00/b7/e3bf5133d697a08128598c8d0abc5e16377b51465a33756de24fa7dee953/aiosqlite-0.22.1-py3-none-any.whl", hash = "sha256:21c002eb13823fad740196c5a2e9d8e62f6243bd9e7e4a1f87fb5e44ecb4fceb" },
+]
+
 [[package]]
 name = "annotated-doc"
 version = "0.0.4"
@@ -792,6 +801,7 @@ name = "rakuten-scraper-service"
 version = "0.1.0"
 source = { virtual = "." }
 dependencies = [
+    { name = "aiosqlite" },
     { name = "fastapi" },
     { name = "httpx", extra = ["http2"] },
     { name = "loguru" },
@@ -817,6 +827,7 @@ dev = [
 
 [package.metadata]
 requires-dist = [
+    { name = "aiosqlite", specifier = ">=0.20.0,<1.0.0" },
     { name = "fastapi", specifier = ">=0.115.0,<1.0.0" },
     { name = "httpx", extras = ["http2"], specifier = ">=0.27.0,<1.0.0" },
     { name = "loguru", specifier = ">=0.7.0,<1.0.0" },