Can I vibe code Emarsys?

Build a self-hosted lightweight lifecycle email automation system using Node.js (TypeScript), PostgreSQL, Redis, and BullMQ, integrating with SendGrid API for email execution.

1. DATA MODEL:
- Create tables for `contacts` (id, email, phone, attributes JSONB, created_at, updated_at).
- Create tables for `events` (id, contact_id, event_name, payload JSONB, timestamp).
- Create tables for `workflows` (id, name, trigger_event, steps JSONB, active boolean).
- Create tables for `suppressions` (email, reason, created_at).

2. EVENT INGESTION API:
- Expose a POST `/api/v1/events` endpoint accepting event payloads (e.g., `checkout_completed`, `cart_abandoned`).
- Store event, upsert contact details by email, and trigger matching active workflows.

3. WORKFLOW ENGINE:
- Use BullMQ queue to process workflow execution steps: DELAY (e.g. wait 24h), CONDITION (check if contact placed order), SEND_EMAIL (render template with payload data and call SendGrid API).
- Validate suppression table before calling SendGrid. Stop execution if suppressed.

4. COMPLIANCE & UN-SUBSCRIBE:
- Expose an `/unsubscribe` route generating a unique token for every sent email.
- Automatically update suppressions on single-click unsubscribe.

5. FAILURE MODES & TESTING:
- Idempotency: Ensure the same event ID processed twice does not execute duplicate email steps.
- API Rate Limits: Handle SendGrid rate limit responses (429) using exponential backoff in BullMQ queue retry settings.

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