Town: Iceshrimp.NET joins, and its mentions go nowhere new

Iceshrimp.NET 2026.1.2-beta runs in the pasture with AuthorizedFetch on;
its driver registers through the native API and takes Mastodon tokens from
its OAuth form. The pair passes 225 cells. A new Iceshrimp note reaches its
author's followers only, never an account it mentions or answers, until it
is edited (G-0004, peer): delivery cells now say when a server holds a post
only because it was addressed.

The checker credits a seeder's fetch to the object fetched, not to the reply
that needed it; the seeder skips the wait for an accept whose follow was
already accepted; the PrivaPub driver signs its roots in again when a run
reuses saved sessions.

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

tools/pasture/town/dialects/privapub.py

@@ -20,6 +20,7 @@ class PrivaPub(MastodonApi):
 
 	# -- roots and personas
 	def jwt(self, root, password):
+		"""The root's JWT: signed up the first time, signed in again by any later command that reuses saved sessions."""
 		if root in self._jwts:
 			return self._jwts[root]
 		body = {"userName": root, "password": password}
@@ -67,7 +68,7 @@ class PrivaPub(MastodonApi):
 
 	# -- groups: communities (FEP-1b12) and circles
 	def group(self, s, username, name, community, policy="followers", approve=False):
-		jwt = self._jwts[s.account.root]
+		jwt = self.jwt(s.account.root, s.account.password)
 		r = self.http.post(self.base + "/clientapi/group/insert", headers={"Authorization": f"Bearer {jwt}"}, ok={200, 201},
 						   json={"avatarId": s.local_id, "userName": username, "name": name, "description": name,
 								 "isCommunity": community, "postingPolicy": policy, "isDiscoverable": community,
@@ -81,7 +82,7 @@ class PrivaPub(MastodonApi):
 		return super().post(s, spec)
 
 	def _client_post(self, s, spec):
-		jwt = self._jwts[s.account.root]
+		jwt = self.jwt(s.account.root, s.account.password)
 		body = {"avatarId": s.local_id, "text": spec.text, "title": spec.title, "hasContentWarning": bool(spec.cw),
 				"spoilerText": spec.cw}
 		if spec.visibility == "located":