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0003 – Stripe Checkout + webhooks → SQS → worker finalization

Context​

Payments must be safe under retries/out-of-order events and transient failures.

Decision​

Use Stripe Checkout and process completion via webhooks → SQS → worker finalization.

Consequences​

  • Webhook handlers stay fast (verify → enqueue → 200)
  • Worker finalization can retry safely (idempotent)