test(option-a): point SCHWAB_PLAYWRIGHT_URL to CLI's browserless endpoint

Temporarily switch from the local schwab-browser sidecar to the
browserless endpoint used by the working CLI (browser.local.ben.io).
This tests whether /assert 403 is caused by browser environment drift.

compose.yaml

@@ -21,7 +21,7 @@ services:
           memory: 128M
           cpus: '0.1'
     environment:
-      - SCHWAB_PLAYWRIGHT_URL=ws://schwab-browser:3000/playwright/chromium
+      - SCHWAB_PLAYWRIGHT_URL=ws://browser.local.ben.io:3000/playwright/chromium?timeout=300000
       - PORT=8000
     volumes:
       - ./cookies.json:/app/cookies.json