Give the coordinator working crew management tools

- Resolve the crew and workspaces fresh inside each tool run, so a bot or
  workspace created earlier in the same reply is usable: create_bot,
  assign_computer, add_bot_to_workspace, delegate_task and
  set_bot_workspace_instructions.
- Add coordinator-only update_bot, find_bot, find_workspace, delete_bot,
  delete_workspace and remove_bot_from_workspace tools.
- Push server:workspace-removed when a workspace is deleted, and
  workspace_ids on server:bot-updated so a workspace's crew drops a bot
  that was taken out of it.

src/functions/backend/db/bots/grab-crew-workers.ts

@@ -0,0 +1,29 @@
+import BunSQLite from "@moduletrace/bun-sqlite";
+import type { BUN_SQLITE_COBBLE_BOTS } from "@/db/types/db";
+
+type Params = {
+    /**
+     * The workspace to scope them to: only its members. Left out for the
+     * whole crew (the coordinator's own chat).
+     */
+    workspace_id?: number | string | null;
+};
+
+/**
+ * Every worker bot the coordinator can hand work to, by id. Read fresh on
+ * each call rather than carried from the start of the run, so a bot
+ * `create_bot` made earlier in the same reply is already there.
+ */
+export default async function grabCrewWorkers({
+    workspace_id,
+}: Params = {}): Promise<BUN_SQLITE_COBBLE_BOTS[]> {
+    const res = await BunSQLite.sql<BUN_SQLITE_COBBLE_BOTS>({
+        sql: workspace_id
+            ? `SELECT b.* FROM bots b JOIN workspace_bots wb ON wb.bot_id = b.id AND wb.workspace_id = ?
+                WHERE b.kind = 'worker' ORDER BY b.id ASC`
+            : `SELECT * FROM bots WHERE kind = 'worker' ORDER BY id ASC`,
+        values: workspace_id ? [workspace_id] : [],
+    });
+
+    return res.payload || [];
+}