Change unknown to unknown_code for missing Miele codes to avoid confusion (#144699)

* Change unknown to unknown_code

* Update snapshot

* Automatically replace missing codes with None

* Update snapshot

homeassistant/components/miele/const.py

@@ -339,7 +339,7 @@ class StateProgramType(MieleEnum):
     automatic_program = 2
     cleaning_care_program = 3
     maintenance_program = 4
-    unknown = -9999
+    missing2none = -9999
 
 
 class StateDryingStep(MieleEnum):
@@ -353,7 +353,7 @@ class StateDryingStep(MieleEnum):
     hand_iron_2 = 5
     machine_iron = 6
     smoothing = 7
-    unknown = -9999
+    missing2none = -9999
 
 
 WASHING_MACHINE_PROGRAM_ID: dict[int, str] = {

homeassistant/components/miele/vacuum.py

@@ -82,7 +82,7 @@ class MieleVacuumStateCode(MieleEnum):
     blocked_front_wheel = 5900
     docked = 5903, 5904
     remote_controlled = 5910
-    unknown = -9999
+    missing2none = -9999
 
 
 SUPPORTED_FEATURES = (

tests/components/miele/snapshots/test_sensor.ambr

@@ -788,7 +788,6 @@
         'maintenance_program',
         'normal_operation_mode',
         'own_program',
-        'unknown',
       ]),
     }),
     'config_entry_id': <ANY>,
@@ -830,7 +829,6 @@
         'maintenance_program',
         'normal_operation_mode',
         'own_program',
-        'unknown',
       ]),
     }),
     'context': <ANY>,