feat(bus): owner project archive and unarchive (#797)

Jason's owner report 2026-11-06: no way to archive or delete projects.
Archive is the reversible half; delete stays out of scope because project
and run records are write-once evidence.

- project.archive / project.unarchive: human-only (project.create's gate
  minus the tester carve-out; tester, user and agent refused). State is the
  latest row of a new append-only project_archives journal (3s->3t, additive;
  the rows are the audit trail), so projects itself never changes and nothing
  is deleted. Repeats refuse project-already-archived / project-not-archived.
- project.list hides archived projects until {includeArchived:true}, which
  flags each with archived:true; a user still lists granted projects only.
- While archived, thread.create, thread.send, room.open and room.send refuse
  project-archived; every existing record stays readable and unarchive
  restores everything.
- Console: new public/project-archive.js (+css) and project-archive-http.mjs
  routes (chatHTTP's write fence); chat.js gains two one-line hooks,
  index.html one script and one link tag; styling only through the shell's
  .project-archive-control / .project-archived-filter hooks.
- CLI: mosaic project archive|unarchive <name-or-id> and list --archived.
- stack-release COUNTED/LISTED gain project_archives (schema order); schema
  step-count pins and migration fixtures updated for 3t.

bus 1601/1601 (Node 24; Node 26 has the pre-existing project-file socket
stall), webui 582/582, plugins 132/132, cli 1191/1194 (two pre-existing
load flakes of the row253 C4 and land_work families; both pass isolated and
the base commit's full suite fails four of the same family).

scripts/stack-release.sh

@@ -419,7 +419,7 @@ plugin_checks() {
 # Row 181: the tables a bus writer fills without an event in the same transaction, in schema
 # order. A restore drops their rows after STAMP as it drops events, so the guard counts them too.
 # BUILD.md for row 181 names each writer; the T46 guard classifies every table in the schema.
-COUNTED="role_claims thread_claims decision_events messages deliveries task_snapshots projects threads sessions session_defaults thread_opens thread_shares instance_names usage_records session_ops message_cancels request_events request_effects request_snapshots request_snapshot_events request_project_events"
+COUNTED="role_claims thread_claims decision_events messages deliveries task_snapshots projects project_archives threads sessions session_defaults thread_opens thread_shares instance_names usage_records session_ops message_cancels request_events request_effects request_snapshots request_snapshot_events request_project_events"
 
 STORE_JS='
 const {DatabaseSync}=require("node:sqlite");const {pathToFileURL}=require("node:url");