chore(ag-ui): eliminate zip strict

Eliminate the use of zip with the strict=True option as it's not
supported in python 3.9.

Author: stevenh

tests/test_ag_ui.py

@@ -172,11 +172,12 @@ def _fake_uuid4() -> uuid.UUID:
 def assert_events(events: list[str], expected_events: list[str], *, loose: bool = False) -> None:
     expected: str
     event: str
-    for event, expected in zip(events, expected_events, strict=True):
+    for event, expected in zip(events, expected_events):
         if loose:
             expected = normalize_uuids(expected)
             event = normalize_uuids(event)
         assert event == f'data: {expected}\n\n'
+    assert len(events) == len(expected_events)
 
 
 def normalize_uuids(text: str) -> str: