Generate Document Summaries & Q&As from PDF/TXT using GPT-4o with Slack Alerts

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📘 Description This workflow automates document understanding by accepting uploaded PDF or TXT files, extracting their text, generating a structured summary and question–answer set using GPT-4o, validating the AI output, and returning a clean JSON response to the requester. It also sends an internal Slack preview and logs malformed outputs for debugging. It performs intelligent file-type detection, handles binary text extraction, enforces strict JSON formatting from the AI model, and ensures tha