refactor: 合并 dev_scripts 入口为单一 harness.py (#23)

原有 4 个命令行入口（check_harness、sync_wiki_docs、new_task_archive、
export_task_archives）需要在多处文档分别描述，同步核心镜像还要按顺序跑 3 条命令。

合并为 dev_scripts/harness.py，提供 check / sync / archive / export 四个子命令，
各命令实现逻辑逐字取自原脚本，行为未改变；新增 sync --verify 一次完成
导出 → check --strict → 一致性校验。wiki_docs.py 作为库保持不变。

破坏性变更：4 个旧入口已删除，不保留兼容转发。已采用 DevHarness 的业务项目
升级基线时必须同步修改自己的命令与文档。

Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>

tests/test_harness_docs.py

@@ -9,7 +9,7 @@ from pathlib import Path
 ROOT = Path(__file__).resolve().parents[1]
 sys.path.insert(0, str(ROOT / "dev_scripts"))
 
-from check_harness import (  # noqa: E402
+from harness import (  # noqa: E402
     CORE_DOCUMENT_REQUIREMENTS,
     CORE_PAGE_PATHS,
     REQUIRED_FILES,

tests/test_wiki_docs.py

@@ -12,14 +12,12 @@ from unittest.mock import Mock, patch
 ROOT = Path(__file__).resolve().parents[1]
 sys.path.insert(0, str(ROOT / "dev_scripts"))
 
-from new_task_archive import (  # noqa: E402
+from harness import (  # noqa: E402
     build_archive,
-    main as new_archive_main,
-    safe_title,
-)
-from export_task_archives import (  # noqa: E402
     existing_task_mirrors,
     export_task_archives,
+    main as harness_main,
+    safe_title,
     task_target,
 )
 from wiki_docs import (  # noqa: E402
@@ -167,7 +165,7 @@ class ArchiveTests(unittest.TestCase):
         self.assertIn("Task-12-login", result)
         self.assertNotIn("YYYY-MM-DD", result)
 
-    @patch("new_task_archive.WikiClient")
+    @patch("harness.WikiClient")
     def test_create_archive_does_not_change_core_mapping(self, client_class) -> None:
         with tempfile.TemporaryDirectory() as directory:
             config_path = Path(directory) / "wiki-docs.json"
@@ -203,14 +201,15 @@ class ArchiveTests(unittest.TestCase):
                 sys,
                 "argv",
                 [
-                    "new_task_archive.py",
+                    "harness.py",
+                    "archive",
                     "14",
                     "按需导出",
                     "--config",
                     str(config_path),
                 ],
             ):
-                result = new_archive_main()
+                result = harness_main()
             self.assertEqual(config_path.read_text(encoding="utf-8"), original)
         self.assertEqual(result, 0)
         client.create_page.assert_called_once()
@@ -239,7 +238,7 @@ class ArchiveTests(unittest.TestCase):
             "2-初级维护者文档体系.md",
         )
 
-    @patch("export_task_archives.dirty_paths", return_value=[])
+    @patch("harness.dirty_paths", return_value=[])
     def test_incremental_export_skips_same_revision(self, _dirty) -> None:
         with tempfile.TemporaryDirectory() as directory:
             root = Path(directory)
@@ -266,7 +265,7 @@ class ArchiveTests(unittest.TestCase):
         client.get_page_from_metadata.assert_not_called()
 
     @patch(
-        "export_task_archives.dirty_paths",
+        "harness.dirty_paths",
         return_value=[" M docs/task/14-按需导出.md"],
     )
     def test_export_stops_before_wiki_read_when_task_mirror_is_dirty(
@@ -277,7 +276,7 @@ class ArchiveTests(unittest.TestCase):
             export_task_archives(client)
         client.list_pages.assert_not_called()
 
-    @patch("export_task_archives.dirty_paths", return_value=[])
+    @patch("harness.dirty_paths", return_value=[])
     def test_full_export_reads_all_and_never_deletes_extra_file(self, _dirty) -> None:
         with tempfile.TemporaryDirectory() as directory:
             root = Path(directory)