Allow router session tools to read external parquet paths

tests/test_data_agent_router_sessions.py

@@ -123,6 +123,29 @@ class DataAgentRouterSessionTests(unittest.TestCase):
         self.assertEqual(candidate['matched_turn']['query'], '导航去公司')
         self.assertEqual(candidate['prev_turns'][0]['query'], '你好小爱')
 
+    @unittest.skipUnless(HAS_PYARROW, 'pyarrow is required for parquet tests')
+    def test_router_session_tools_allow_external_absolute_paths(self) -> None:
+        with tempfile.TemporaryDirectory() as workspace_dir, tempfile.TemporaryDirectory() as data_dir:
+            _write_router_parquet(Path(data_dir))
+            external_partition = Path(data_dir) / 'router_session_parquet' / 'date=20260428'
+
+            profile = profile_router_sessions(
+                workspace_dir,
+                paths=[str(external_partition)],
+                max_files=1,
+            )
+            search = search_router_sessions(
+                workspace_dir,
+                paths=[str(external_partition)],
+                query_keywords=['导航'],
+                max_files=1,
+                max_candidates=5,
+            )
+
+        self.assertEqual(profile['sampled_row_count'], 2)
+        self.assertEqual(search['candidate_count'], 1)
+        self.assertEqual(search['candidates'][0]['matched_turn']['query'], '导航去公司')
+
     @unittest.skipUnless(HAS_PYARROW, 'pyarrow is required for parquet tests')
     def test_router_session_tools_execute_against_registry(self) -> None:
         with tempfile.TemporaryDirectory() as tmp_dir: