初始提交：QuickTeam 工单接口导入工具

用「WCF + 通用存储过程网关」接口替代 Selenium（D://Learning//Python//工单自动化）导入工单：
单 Sprint 12 个项目 175s 跑完（旧方案 25~35 分钟），失败可断点续跑且不重复建单。

- 分层：transport（HTTP/协议）/ api（存储过程语义）/ domain（纯规则）/
  workflow（阶段编排）/ store（SQLite 台账）/ report / CLI
- 幂等：台账驱动断点续跑；dry-run 与跳过行不污染进度；--rollback-on-fail 清理半成品
- 命令：plan / apply / report / status，真实写入需 --yes
- tools：只读探针、存储过程源码导出（sp_helptext）、导入诊断
- docs：调研与设计文档（含联调踩到的 5 个坑）+ 6 个关键存储过程源码

实测：Sprint 2026 Sprint 10 的 12 个项目全部完成建单→导入→确认→推送 TFS，
工单 225134–225145，35 个功能模块，重跑 plan 全部 skip-pushed。69 个单测通过。

tests/test_transport.py

@@ -0,0 +1,63 @@
+"""传输层与错误解析的单元测试（不联网）。"""
+
+from __future__ import annotations
+
+import unittest
+
+from qtimport.errors import Category, QtError, extract_exception_message
+from qtimport.transport import Transport
+
+
+WCF_ERROR_PAGE = """\ufeff<?xml version="1.0" encoding="utf-8"?>
+<html><body><div id="content">
+  <p class="heading1">Request Error</p>
+  <p>The server encountered an error processing the request. The exception message is
+  'Could not find stored procedure 'QuickTeam.usp_Nope'.'. See server logs for more details.</p>
+</div></body></html>"""
+
+
+class DecodeTest(unittest.TestCase):
+    def test_plain_json(self) -> None:
+        self.assertEqual(Transport.decode('[{"A":1}]'), [{"A": 1}])
+
+    def test_double_encoded(self) -> None:
+        raw = '"[{\\"WorkSheetId\\": 225072}]"'
+        self.assertEqual(Transport.decode(raw)[0]["WorkSheetId"], 225072)
+
+    def test_triple_encoded(self) -> None:
+        raw = '"\\"[{\\\\\\"A\\\\\\": 1}]\\""'
+        self.assertEqual(Transport.decode(raw), [{"A": 1}])
+
+    def test_scalar_string(self) -> None:
+        self.assertEqual(Transport.decode('"0"'), 0)
+
+    def test_not_json(self) -> None:
+        self.assertEqual(Transport.decode("<html/>"), "<html/>")
+
+
+class ErrorTest(unittest.TestCase):
+    def test_extract_message(self) -> None:
+        message = extract_exception_message(WCF_ERROR_PAGE)
+        self.assertIn("Could not find stored procedure", message)
+
+    def test_missing_procedure_not_retryable(self) -> None:
+        error = QtError.from_http(400, WCF_ERROR_PAGE)
+        self.assertEqual(error.category, Category.SP_MISSING)
+        self.assertFalse(error.retryable)
+
+    def test_param_error(self) -> None:
+        body = "<p>The exception message is 'Procedure or function usp_X has too many arguments "
+        body += "specified.'. See server logs</p>"
+        self.assertEqual(QtError.from_http(400, body).category, Category.PARAM)
+
+    def test_server_error_retryable(self) -> None:
+        error = QtError.from_http(503, "<p>Service Unavailable</p>")
+        self.assertTrue(error.retryable)
+
+    def test_html_unescaped(self) -> None:
+        body = "<p>The exception message is 'Parameter &#39;UserId&#39; is missing.'. See server logs</p>"
+        self.assertIn("UserId", extract_exception_message(body))
+
+
+if __name__ == "__main__":
+    unittest.main()