rename all variants of naming that hold an AyaType value to "aType" (parameter) / "AType" (not parameter) everywhere front and back; "ayType", "objectType", "oType" all are used in various areas

server/AyaNova/util/FileUtil.cs

@@ -451,7 +451,7 @@ namespace AyaNova.Util
                 Notes = notes,
                 ContentType = contentType,
                 AttachToObjectId = attachToObject.ObjectId,
-                AttachToObjectType = attachToObject.ObjectType,
+                AttachToAType = attachToObject.AType,
                 LastModified = lastModified,
                 Size = FileSize
 
@@ -495,7 +495,7 @@ namespace AyaNova.Util
         //
         internal static async Task DeleteAttachmentsForObjectAsync(AyaType ayaType, long ayaId, AyContext ct)
         {
-            var deleteList = await ct.FileAttachment.Where(z => z.AttachToObjectId == ayaId && z.AttachToObjectType == ayaType).ToListAsync();
+            var deleteList = await ct.FileAttachment.Where(z => z.AttachToObjectId == ayaId && z.AttachToAType == ayaType).ToListAsync();
             foreach (var d in deleteList)
             {
                 await DeleteFileAttachmentAsync(d, ct);