Share one crew across the install, keep user memory per user

Bots, workspaces and computers now belong to the install. Users reach
workers only through bot_users (assigned by a super admin or admin) and
workspace_users; the coordinator and main computer are one per install,
and only the super admin sees the coordinator. Conversations are per
user (bot_sessions.user_id), jobs run for the session's user, and live
updates go only to who should see them.

A bot's core memory is now general knowledge shared by every user it
works for; what it learns about a user lives in bot_user_memories.

One-off scripts move existing installs over: move-bot-memory-to-owners
(run first), then share-crew.

Co-Authored-By: Claude Opus 5.5 <[email protected]>

src/pages/admin/bots/index.tsx

@@ -1,11 +1,13 @@
 import type { BunextPageModuleMeta } from "@moduletrace/bunext/types";
 import { SiteData } from "@/src/data/site-data";
+import NoBotsSection from "./(sections)/no-bots-section";
 
 /**
- * Never rendered: `index.server.ts` always redirects to the coordinator.
+ * Only rendered for a user who reaches no bot yet: `index.server.ts`
+ * otherwise redirects to a conversation.
  */
 export default function BotsPage() {
-    return null;
+    return <NoBotsSection />;
 }
 
 export const meta: BunextPageModuleMeta = {