video1.0<iframe src="https://www.loom.com/embed/679eb54f26de4ab98d895c8f9c7f493b" frameborder="0" width="1920" height="1440" webkitallowfullscreen mozallowfullscreen allowfullscreen></iframe>14401920Loomhttps://www.loom.com14401920https://cdn.loom.com/sessions/thumbnails/679eb54f26de4ab98d895c8f9c7f493b-1fc8c1849fc2b522.gif237.805A technical walkthrough of a Fault-Tolerant Financial Monitor designed to prevent project budget overruns in real-time. Architecture Highlights: Tech Stack: n8n (Self-Hosted Docker), PostgreSQL, ClickUp API, Webhooks. State Machine Logic: Uses a local database to track atomic state changes, ensuring alerts are only sent during critical status shifts (Idempotency). Dead Letter Queue (DLQ): A dedicated error-handling branch that logs failed API calls to Postgres for audit and retry, preventing silent data loss. This system demonstrates how to move beyond simple "Trigger-Action" automations into robust, state-aware engineering.