Configure n8n workflow for automated Tabulus processing

[jd-coderepos]

Set up an example n8n workflow (https://n8n.io/) for automating a basic Tabulus processing pipeline: a scientific PDF or PDF URL is submitted through a webhook, passed to the Tabulus backend, processed, and the resulting structured or enriched CSV output is returned, saved, or forwarded.

• Add an example n8n workflow for PDF or PDF URL input
• Trigger the workflow through an n8n webhook
• Call the Tabulus backend from the workflow
• Retrieve the generated structured output
• Save, return, or forward the resulting CSV/output file
• Document the required environment variables, service URLs, and credentials
• Ensure no secrets or private credentials are committed
• Add a small sample input for testing the workflow
• Document how to import and run the workflow in n8n