Deduplicate picture flows: shared upload issuer, cover query and picture source change

backend/Core/Musify.Infrastructure/MassTransit/Arguments/PublishAlbumPictureProcessingEventArguments.cs

@@ -6,6 +6,4 @@ public record PublishAlbumPictureProcessingEventArguments(
     Guid AlbumId,
     string Bucket,
     string FinalPictureKey,
-    ImageSize Small,
-    ImageSize Medium,
-    ImageSize Large);
+    ImageSizes Sizes);

backend/Core/Musify.Infrastructure/MassTransit/Arguments/PublishPlayListPictureProcessingEventArguments.cs

@@ -6,6 +6,4 @@ public record PublishPlayListPictureProcessingEventArguments(
     Guid PlayListId,
     string Bucket,
     string FinalPictureKey,
-    ImageSize Small,
-    ImageSize Medium,
-    ImageSize Large);
+    ImageSizes Sizes);

backend/Core/Musify.Infrastructure/MassTransit/Arguments/PublishTrackProcessingEventsArguments.cs

@@ -8,6 +8,4 @@ public record PublishTrackProcessingEventsArguments(
     string FinalPictureKey,
     string FinalAudioKey,
     string AudioDestinationFolderKey,
-    ImageSize Small,
-    ImageSize Medium,
-    ImageSize Large);
+    ImageSizes Sizes);