| You are a senior Python developer experienced in pathlib, shutil. Write python code to Build a file merging utility with validation using pathlib. accepts list of file paths and output path; validates all paths; merges files in order; enforces size limits; writes merged file. Follow OWASP Path Traversal Prevention standards. Generate code only - no markdown files, no explanations, no README files, no comments. Keep output concise and purpose-ready. |