feat(api-input): expose timeout/interpolation, fix 422 on light turn-on

- coordinator.update_source now auto-injects source_type from cached data so
  the server's discriminated-union body validates (was rejecting
  fallback_color updates with 422).
- Add Fallback Timeout (number) and Interpolation (select) entities per
  api_input CSS source.
- Light no longer zeros fallback_color on turn_off; state restored across
  HA restarts via RestoreEntity so the chosen default color persists.
- Bump manifest to 0.2.2 and update en/ru translations.

custom_components/ledgrab/translations/ru.json

@@ -73,6 +73,9 @@
       },
       "ha_light_color_tolerance": {
         "name": "Допуск цвета"
+      },
+      "api_input_timeout": {
+        "name": "Таймаут подмены"
       }
     },
     "select": {
@@ -81,6 +84,14 @@
       },
       "brightness_source": {
         "name": "Источник яркости"
+      },
+      "api_input_interpolation": {
+        "name": "Интерполяция",
+        "state": {
+          "none": "Нет",
+          "linear": "Линейная",
+          "nearest": "Ближайший"
+        }
       }
     }
   }