AI-Powered Document Chat with Nextcloud Files using LangChain and OpenAI

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Main Workflow “AI Nextcloud” Entry point**: A public chat-trigger greets the user; every incoming chat message starts the flow. AI agent**: A LangChain agent (“AI Nextcloud”) uses the configured OpenAI model plus short-term memory to continue the dialogue in context. Purpose**: Answers questions about files stored in a Nextcloud folder. The user simply includes the folder path in their question. Tool integration**: Calls the sub-workflow “Nextcloud Tool” whenever it needs to read files and pass