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

tools/pasture/peers/shared.sh

@@ -1,9 +1,11 @@
 # Services several peers share: one Postgres and one MySQL (each peer gets its own database), and one Redis (each its own
-# db number).
+# db number). A dozen peers keep their pools on the one Postgres, and Postgres's default 100 connections ran out while
+# the town seeded (Sharkey's API answered 500, Misskey's queue dropped deliveries): it takes 400.
 shared_postgres_up() {
 	podman container exists pasture-postgres && return 0
 	podman run -d --replace --name pasture-postgres --network $net --network-alias postgres \
-		-e POSTGRES_USER=pasture -e POSTGRES_PASSWORD=pasture -e POSTGRES_DB=pasture docker.io/library/postgres:17-alpine >/dev/null
+		-e POSTGRES_USER=pasture -e POSTGRES_PASSWORD=pasture -e POSTGRES_DB=pasture docker.io/library/postgres:17-alpine \
+		-c max_connections=400 >/dev/null
 	for _ in $(seq 1 60); do podman exec pasture-postgres pg_isready -U pasture >/dev/null 2>&1 && return 0; sleep 1; done
 	echo "postgres did not start" >&2; return 1
 }