fix(flomni): don't crash feye_out() when fttrx1 isn't in the config

feye_out() unconditionally moved dev.fttrx1 out of the way, raising
an unhandled DeviceConfigError on any session (e.g. sim) where that
device isn't configured, after already having closed the shutter and
moved other optics. Now checks "fttrx1" in dev first (same pattern
already used for rtx elsewhere in this file) and, if absent, asks via
OMNYTools.yesno() whether to continue without moving it instead of
crashing.

Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>

csaxs_bec/bec_ipython_client/plugins/flomni/flomni_optics_mixin.py

@@ -30,8 +30,17 @@ class FlomniOpticsMixin:
 
         # move rotation stage to zero to avoid problems with wires
         umv(dev.fsamroy, 0)
-        fttrx_in = self._get_user_param_safe("feyex", "fttrx_in")
-        umv(dev.fttrx1, fttrx_in)
+
+        if "fttrx1" not in dev:
+            if not self.OMNYTools.yesno(
+                "Device 'fttrx1' does not exist in the current config, so it "
+                "can't be moved out of the way. Continue anyway?"
+            ):
+                print("Aborting feye_out(): fttrx1 not moved.")
+                return
+        else:
+            fttrx_in = self._get_user_param_safe("feyex", "fttrx_in")
+            umv(dev.fttrx1, fttrx_in)
 
     def feye_in(self):
         bec.queue.next_dataset_number += 1