Change level as index of warning_dirstrict::ohm

lib/weather-model/source_schemas/warning.rb

@@ -11,8 +11,8 @@ module WeatherModel
         unit: :string
       },
       options: {
-        index: [:publishtime, :unit],
-        expire: 11 * 24 * 60 * 60,
+        index: [:publishtime, :level, :unit],
+        expire: 2 * 24 * 60 * 60,
         unique: nil,
         belongs_to: nil,
         has_many: nil,