Follow requests nobody answers are sent again

A Follow was resent only when the persona followed again. Lemmy 1.0
sends nothing it queued for a server before it started sending there, so
the Accept of a community follow made on first contact was lost for good:
the village's persona stayed "requested" a day while Lemmy listed her as a
follower, and every post the community announced was refused as not
followed. A request still unanswered is now sent again, the same activity,
after 15 minutes, an hour, 6 hours, a day, two and four days
(FollowResender, every 15 minutes); a server that holds the follow answers
the copy.

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

PrivaPub/Models/Social/Following.cs

@@ -13,6 +13,8 @@ namespace PrivaPub.Models.Social
 		public string FollowActivityURI { get; set; }
 		public bool ShowReblogs { get; set; } = true;
 		public DateTime CreatedAt { get; set; } = DateTime.UtcNow;
+		public int Resent { get; set; }//how many times a request still unanswered was sent again (FollowService.ResendPending)
+		public DateTime? ResentAt { get; set; }
 	}
 
 	public enum FollowState