A moved account's profile says where it went

PrivaPub now fills `moved` once a move is believed; the profile shows it, linking
the new account's profile. The e2e opens the account SocialPub's moves scenario
moved and finds the new one named.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01LsXgEaXee4GCU1hwYgPJXw

Models/Mastodon/Account.cs

@@ -25,6 +25,8 @@ public class Account
 	public string LastStatusAt { get; set; }
 	public List<CustomEmoji> Emojis { get; set; } = [];
 	public List<AccountField> Fields { get; set; } = [];
+	/// <summary>The account it moved to (PrivaPub shows it once the new account names this one among its aliases).</summary>
+	public Account Moved { get; set; }
 	/// <summary>Whether it is listed in the directory and suggested; null when its server does not say.</summary>
 	public bool? Discoverable { get; set; }
 	/// <summary>Whether its public posts may be found by full-text search.</summary>