Increased Python minimum version for stability

The minimum supported Python version has been raised from 3.9 to 3.11. This change was necessary because dependencies such as onnxruntime and transformers require Python 3.10 or higher. The previous threshold allowed systems with Python 3.9.6 to pass checks only to fail during runtime setup on macOS.

• Bump minimum Python from 3.9 to 3.11

• Dependencies require Python 3.10+

• Updated error messages and requirements header