feat: add assessment workbench and September reconciliation

Preserve August hydrogen revision and September audit evidence; calculate interrupted vehicle history across all prior months. Record remaining carry-policy and layout-baseline discrepancies.

assessment_service/__main__.py

@@ -0,0 +1,18 @@
+import argparse
+from wsgiref.simple_server import make_server
+
+from .app import App
+
+
+def main():
+    parser = argparse.ArgumentParser(description="月度租赁考核源表服务（本机首版）")
+    parser.add_argument("--port", type=int, default=8765)
+    parser.add_argument("--data-dir", default=".assessment-data")
+    args = parser.parse_args()
+    with make_server("127.0.0.1", args.port, App(args.data_dir)) as server:
+        print(f"考核服务: http://127.0.0.1:{args.port}，数据目录: {args.data_dir}", flush=True)
+        server.serve_forever()
+
+
+if __name__ == "__main__":
+    main()