Test `test_actor_handles_migrating_event_correctly` is flaky

[vdusek]

• Linux Python 3.14.
• Failing log run e.g. here
• Failing test summary:

=========================== short test summary info ============================
FAILED tests/unit/actor/test_actor_lifecycle.py::test_actor_handles_migrating_event_correctly - assert EventPersistStateData(is_migrating=False) == EventPersistStateData(is_migrating=True)
  
  Full diff:
  - EventPersistStateData(is_migrating=True)
  ?                                    ^^^
  + EventPersistStateData(is_migrating=False)
  ?                                    ^^^^
================= 1 failed, 244 passed, 336 warnings in 22.38s =================