fix(flomni,omny): expose motor tolerance to scan-server device proxy

self.dev.fsamroy/.osamroy on the scan server is a generic bec_lib
Positioner proxy rebuilt from serialized device info, not the real
ophyd instance. tolerance was only a plain __init__ attribute, so it
was dropped during serialization and flomni_rotation()/rotation()
crashed with AttributeError: 'Positioner' object has no attribute
'tolerance'. Register tolerance in USER_ACCESS so it serializes and
is reachable via RPC like controller already is.

csaxs_bec/devices/omny/galil/fupr_ophyd.py

@@ -113,7 +113,7 @@ class FuprGalilAxesReferenced(GalilAxesReferenced):
 
 
 class FuprGalilMotor(Device, PositionerBase):
-    USER_ACCESS = ["controller"]
+    USER_ACCESS = ["controller", "tolerance"]
     MOTOR_RESOLUTION = 25600
     readback = Cpt(FuprGalilReadbackSignal, signal_name="readback", kind="hinted")
     user_setpoint = Cpt(FuprGalilSetpointSignal, signal_name="setpoint")

csaxs_bec/devices/omny/galil/ogalil_ophyd.py

@@ -241,6 +241,7 @@ class OMNYGalilMotor(Device, PositionerBase):
         "axis_is_referenced",
         "get_motor_temperature",
         "folerr_status",
+        "tolerance",
     ]
     readback = Cpt(OMNYGalilReadbackSignal, signal_name="readback", kind="hinted")
     user_setpoint = Cpt(GalilSetpointSignal, signal_name="setpoint")