Start adding server support

Application/Feeds/AccountReadInput.cs

@@ -0,0 +1,11 @@
+using System;
+
+namespace FeedCenter;
+
+public class AccountReadInput(FeedCenterEntities entities, Guid? feedId, bool forceRead, Action incrementProgress)
+{
+    public FeedCenterEntities Entities { get; set; } = entities;
+    public Guid? FeedId { get; set; } = feedId;
+    public bool ForceRead { get; set; } = forceRead;
+    public Action IncrementProgress { get; private set; } = incrementProgress ?? throw new ArgumentNullException(nameof(incrementProgress));
+}