add timeout mcp poll

tests/test_graylog_source.py

@@ -1,4 +1,5 @@
 import unittest
+import time
 
 from fgai.graylog_source import GraylogStreamSource
 
@@ -73,6 +74,14 @@ class GraylogSourceTests(unittest.TestCase):
         self.assertTrue(status["partial"])
         self.assertIn("graylog_search_error", status["error"])
 
+    def test_deadline_stops_raw_fetch_before_search(self):
+        client = _Client()
+        events, status = GraylogStreamSource(client, "vpn").fetch(deadline_monotonic=time.monotonic() - 1)
+        self.assertEqual(events, [])
+        self.assertTrue(status["partial"])
+        self.assertEqual(status["error"], "poll_budget_exceeded")
+        self.assertIsNone(client.arguments)
+
     def test_returns_partial_status_instead_of_raising_on_probe_error(self):
         events, status = GraylogStreamSource(_ProbeErrorClient(), "vpn").fetch()
         self.assertEqual(events, [])