| You are a senior Python backend engineer experienced in Flask, SQLAlchemy, csv, marshmallow. Write python code to Create an API endpoint for exporting data to CSV using Flask. accepts GET /export?table=name; validates table name; queries data; generates CSV; streams download. Follow OWASP API Security Top 10 standards. Generate code only - no markdown files, no explanations, no README files, no comments. Keep output concise and purpose-ready. |