feat: grab sensor firmware version for detail sheet

lib/domain/models/sensor.dart

@@ -7,6 +7,7 @@ class Sensor {
     this.roomId,
     this.x,
     this.y,
+    this.version,
   });
 
   final int id;
@@ -16,6 +17,7 @@ class Sensor {
   final int? roomId;
   final double? x;       // room relative
   final double? y;       // room relative
+  final String? version;
 
   bool get isPlaced => roomId != null && x != null && y != null;
   String get displayName => name ?? sensorId;
@@ -28,6 +30,7 @@ class Sensor {
         roomId: json['room_id'] as int?,
         x: (json['x'] as num?)?.toDouble(),
         y: (json['y'] as num?)?.toDouble(),
+        version: json['version'] as String?,
       );
 
   Sensor copyWith({
@@ -35,7 +38,7 @@ class Sensor {
     int? roomId,
     double? x,
     double? y,
-    double? rssiRef,
+    String? version,
   }) =>
       Sensor(
         id: id,
@@ -45,5 +48,6 @@ class Sensor {
         roomId: roomId ?? this.roomId,
         x: x ?? this.x,
         y: y ?? this.y,
+        version: version ?? this.version,
       );
 }