7.2Synthetic Monitoring Architecture

  +-------------------+
  | Scheduler (cron)  |  -- Every 5 minutes from 3 regions
  +---------+---------+
            |
            v
  +---------+---------+     +---------+---------+     +---------+---------+
  | us-east-1 runner  |     | eu-west-1 runner  |     | ap-south-1 runner |
  | - Login flow      |     | - Login flow      |     | - Login flow      |
  | - Search flow     |     | - Search flow     |     | - Search flow     |
  | - Checkout flow   |     | - Checkout flow   |     | - Checkout flow   |
  +---------+---------+     +---------+---------+     +---------+---------+
            |                         |                         |
            +------------+------------+------------+------------+
                         |
                         v
              +----------+----------+
              | Metrics / Alerting  |   <-- Grafana, Datadog, PagerDuty
              | - Pass/fail status  |
              | - Response times    |
              | - Screenshot diffs  |
              +---------------------+