Remove broker session rest

Reverts 062ec07 and 5eb0ea7: every firm's broker session stays logged in
around the clock again, renewing its token on the fixed timer as before.
The tree is back to 6dd2528's. A session_rest row left in settings is
unused.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

app/api/firms/[id]/orders/route.ts

@@ -1,7 +1,7 @@
 import { NextRequest, NextResponse } from 'next/server';
 import { getCachedFirm } from '@/lib/firm-catalog';
 import { firmInstruments, isFuturesFirm } from '@/lib/instruments';
-import { getClients, isWaking, wakeFirm } from '@/lib/clients';
+import { getClients } from '@/lib/clients';
 
 export async function POST(
     req: NextRequest,
@@ -27,11 +27,6 @@ export async function POST(
         const clients = getClients();
         const client = clients.get(firmId);
         if (!client) return NextResponse.json({ error: 'Client not found for firm' }, { status: 404 });
-        // A resting session (lib/clients.ts) holds no login: start one, and
-        // let the caller come back once it's up.
-        if (wakeFirm(firmId, 'manual order') || isWaking(firmId)) {
-            return NextResponse.json({ error: "the firm's session is logging back in — try again in a minute" }, { status: 503 });
-        }
 
         // A futures firm trades only what its instrument list (master Firms
         // page) names.