Add mappings for cleaning fluid states.

Author: pauloruberto

roborock/data/v1/v1_code_mappings.py

@@ -123,6 +123,13 @@ class DustBagStatus(RoborockDssCodes):
     full = 34
 
 
+class CleanFluidStatus(RoborockDssCodes):
+    """Status of the cleaning fluid container."""
+
+    empty_not_installed = 1
+    okay = 2
+
+
 class RoborockErrorCode(RoborockEnum):
     none = 0
     lidar_blocked = 1

roborock/data/v1/v1_containers.py

@@ -39,6 +39,7 @@
 
 from ..containers import RoborockBase, RoborockBaseTimer, _attr_repr
 from .v1_code_mappings import (
+    CleanFluidStatus,
     ClearWaterBoxStatus,
     DirtyWaterBoxStatus,
     DustBagStatus,
@@ -229,9 +230,12 @@ def water_box_filter_status(self) -> int | None:
         return None
 
     @property
-    def clean_fluid_status(self) -> int | None:
+    def clean_fluid_status(self) -> CleanFluidStatus | None:
         if self.dss:
-            return (self.dss >> 10) & 3
+            value = (self.dss >> 10) & 3
+            if value == 0:
+                return None  # Feature not supported by this device
+            return CleanFluidStatus(value)
         return None
 
     @property