feat(alipay): add Alipay life account video uploader

- New uploader/alipay_uploader module: QR-code cookie login, upload page
  flow, title/desc/tags fill, thumbnail, collection and publish
- sau_cli: add 'alipay login/check/upload-video' subcommands
- examples: get_alipay_cookie.py and test_alipay_upload.py
- utils/log.py: register alipay logger
- utils/login_qrcode.py: robust QR decode on non-ASCII Windows paths
  (numpy imdecode with cv2.imread fallback)

examples/get_alipay_cookie.py

@@ -0,0 +1,18 @@
+# -*- coding: utf-8 -*-
+"""获取支付宝生活号 cookie：打开浏览器扫码登录后自动保存到 cookies/alipay_uploader/account.json"""
+import asyncio
+import sys
+from pathlib import Path
+
+sys.path.insert(0, str(Path(__file__).resolve().parents[1]))
+
+from uploader.alipay_uploader.main import alipay_cookie_gen
+
+
+async def main():
+    account_file = Path(__file__).resolve().parents[1] / "cookies" / "alipay_uploader" / "account.json"
+    await alipay_cookie_gen(str(account_file))
+
+
+if __name__ == "__main__":
+    asyncio.run(main())