test(lamni): FakeDev supports "in" checks for fttrz/dttrz in leye_out test

leye_out() checks "fttrz"/"dttrz" in dev since 5d838f9; the fake device
container in test_leye_out_closes_the_fast_shutter didn't support that.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01LJWYXx4SS8NgFWog81xjyf

tests/tests_bec_ipython_client/test_lamni_golive_fixes.py

@@ -183,6 +183,11 @@ def test_leye_out_closes_the_fast_shutter(monkeypatch):
         fsh = FakeShutter()
         leyey = object()
         lsamrot = object()
+        fttrz = object()
+        dttrz = object()
+
+        def __contains__(self, name):
+            return hasattr(self, name)
 
     monkeypatch.setattr(optics_mixin_module, "dev", FakeDev(), raising=False)
     monkeypatch.setattr(optics_mixin_module, "umv", lambda *a: None, raising=False)