修复运行时凭证与网络出口兼容性

test_main.py

@@ -42,6 +42,19 @@ class AutoAdaptationTests(unittest.TestCase):
         token = resolve_runtime_token({"EXTERNAL_SERVICE_TOKEN": "private-value"})
         self.assertEqual(token, "private-value")
 
+    def test_runtime_token_file_is_supported(self):
+        token = resolve_runtime_token(
+            {"XC_TOKEN_FILE": "/run/secrets/xc-token"},
+            read_text=lambda path: "mounted-private-value\n"
+            if path == "/run/secrets/xc-token"
+            else "",
+        )
+        self.assertEqual(token, "mounted-private-value")
+
+    def test_placeholder_runtime_token_is_rejected(self):
+        token = resolve_runtime_token({"EXTERNAL_SERVICE_TOKEN": "tmp"})
+        self.assertEqual(token, "")
+
     def test_explicit_modelhub_token_takes_precedence(self):
         token = resolve_runtime_token(
             {