Do CloudKit record process loop on a high priority background thread so that it doesn't block the main thread

Frameworks/Account/CloudKit/CloudKitArticlesZoneDelegate.swift

@@ -132,8 +132,12 @@ private extension CloudKitArticlesZoneDelegate {
 			group.leave()
 		}
 		
-		let parsedItems = records.compactMap { makeParsedItem($0) }
+		group.enter()
+		DispatchQueue.global(qos: .userInitiated).async {
+			let parsedItems = records.compactMap { self.makeParsedItem($0) }
 			let webFeedIDsAndItems = Dictionary(grouping: parsedItems, by: { item in item.feedURL } ).mapValues { Set($0) }
+			
+			DispatchQueue.main.async {
 				for (webFeedID, parsedItems) in webFeedIDsAndItems {
 					group.enter()
 					self.account?.update(webFeedID, with: parsedItems, deleteOlder: false) { result in
@@ -153,6 +157,10 @@ private extension CloudKitArticlesZoneDelegate {
 						}
 					}
 				}
+				group.leave()
+			}
+			
+		}
 		
 		group.notify(queue: DispatchQueue.main) {
 			if errorOccurred {