Generate & Test SQL Code with GPT/OpenRouter AI and PostgreSQL Sandbox

This is the core AI agent used for queryverify.com. Don't trust complex AI-generated SQL queries without double-checking them in a safe environment. That's where queryverify comes in. It automatically creates a test environment with the necessary data, generates code for your task, runs it to double-check for correctness, and handles errors if necessary. If you enable auto-fixing, queryverify will detect and fix issues on its own. If not, it will ask for your permission before making changes during debugging. In the end, you get thoroughly verified code along with full details about the environment it ran in. Setup It is an embedded chat for the website, but you can pin input data and run it

Help me set up the n8n workflow "Generate & Test SQL Code with GPT/OpenRouter AI and PostgreSQL Sandbox" (https://n8n.io/workflows/6583). It uses: Postgres, MySQL, Code, AI Agent, Simple Memory, OpenAI, OpenRouter Chat Model. Import the template JSON into my n8n instance, list every credential I need to create, and walk me through testing it.