Pasture: Smithereen 1.0.3, and failed server descriptions retried

Smithereen joins the pasture (tools/pasture/peers/smithereen.sh): its image on the shared MySQL, with imgproxy and a
file server behind Caddy, a JDK trust store with the pasture's CA, accounts from its signup form, and a password grant
for a local application. scenarios/smithereen.sh drives its VKontakte-like API: friends as mutual follows, wall posts,
comments, likes, reposts (quotes there), polls, edits, deletions, private messages, the unfollow and statistics, 30
checks. A post on someone else's wall never reaches PrivaPub, since Smithereen sends it only to servers whose actors
publish a wall: G-0009, waiting for the owner.

PrivaPub: a server description that failed (Smithereen serves no NodeInfo until it has a description) frees its week,
so the server's next arrival asks again instead of a week later.

The shared Postgres takes 400 connections: at 100 the village seed ran it dry (Sharkey's API answered 500, Misskey
dropped deliveries). The seeder records a follow that stands from an earlier seed when the step itself fails, so the
checker no longer expects that follower to see nothing.

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

PrivaPub/Federation/Objects/InstanceDescriber.cs

@@ -42,7 +42,10 @@ namespace PrivaPub.Federation.Objects
 
 		public async Task<JobOutcome> Handle(Job job, CancellationToken token)
 		{
-			await Describe(job.Payload, crawled: false, default, token);
+			// a description that failed (Smithereen serves no NodeInfo until its admin writes a description) frees its
+			// week's key, so the server's next arrival, an hour on at the soonest, asks again
+			if (!await Describe(job.Payload, crawled: false, default, token) && !string.IsNullOrEmpty(job.DedupeKey))
+				await DB.Default.Update<Job>().MatchID(job.ID).Modify(j => j.DedupeKey, $"{job.DedupeKey}|failed|{job.ID}").ExecuteAsync(token);
 			return JobOutcome.Done;
 		}