Automated Invoice Processing with Telegram, GPT-4o, OCR and SAP Integration

++HOW IT WORKS:++ This workflow automates the processing of invoices sent via Telegram. It extracts the data using LlamaIndex OCR, logs it in Google Sheets, and optionally pushes the structured data to SAP Business One 🔹 1. Receive Invoice via Telegram: A user sends a PDF of an invoice through Telegram A Telegram Trigger node listens for incoming messages and captures the file and metadata The document is downloaded and prepared for OCR 🔹 2. OCR with LlamaIndex: The file is uploaded to the LlamaIndex OCR API. The workflow polls the API until the processing status returns SUCCESS Once ready, the parsed content is fetched in Markdown format 🔹 3. Data Extraction via LLM (editable): The Markd

Help me set up the n8n workflow "Automated Invoice Processing with Telegram, GPT-4o, OCR and SAP Integration" (https://n8n.io/workflows/4849). It uses: Google Sheets, HTTP Request, Telegram, Code, Basic LLM Chain, OpenAI Chat Model, Structured Output Parser. Import the template JSON into my n8n instance, list every credential I need to create, and walk me through testing it.