Add workspaces, computers, bot memory and the bots queue

- Schema: workspaces (+ workspace_bots, workspace_computers), containers,
  computers, bot_computers, bots.memory, workspaces.system_prompt, and
  bots_queue as a bun-sqlite isQueue table
- Main computer (and its container record) ensured with the coordinator on
  signup, seed and /admin/bots; the coordinator's access to it is locked
- Effective computer access: direct grants plus workspace computers
- Full bot prompt: core instructions, workspace prompts, then memory;
  bots can rewrite their memory and system prompt
- Queue helpers on the native BunSQLite.queue API, plus a handler that
  heartbeats, serializes per computer, recovers after restarts, reports
  lost jobs, supports cancelling and pushes outcomes over the WebSocket
- Enable SQLite foreign keys at startup so schema cascades fire
- Prune finished jobs daily

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

src/pages/admin/bots/index.server.ts

@@ -1,11 +1,12 @@
 import userAuth from "@/src/functions/backend/auth/user-auth";
 import ensureCoordinatorBot from "@/src/functions/backend/db/bots/ensure-coordinator-bot";
+import ensureMainComputer from "@/src/functions/backend/db/computers/ensure-main-computer";
 import type { PagePropsType } from "@/src/types";
 import type { BunextPageServerFn } from "@moduletrace/bunext/types";
 
 /**
- * Opens the coordinator's conversation, creating the coordinator first if
- * this workspace doesn't have one yet.
+ * Opens the coordinator's conversation, creating the coordinator and the
+ * main computer first if this account doesn't have them yet.
  */
 export const server: BunextPageServerFn<PagePropsType> = async ({ req }) => {
     const { user } = await userAuth({ req });
@@ -19,6 +20,7 @@ export const server: BunextPageServerFn<PagePropsType> = async ({ req }) => {
     }
 
     const coordinator_id = await ensureCoordinatorBot({ user_id: user.id });
+    await ensureMainComputer({ user_id: user.id, coordinator_id });
 
     return {
         redirect: {