Resolves build failure caused by PEP 668 "externally-managed-environment"
protection in Python 3.11+. The --break-system-packages flag is safe to
use in this containerized development environment as it won't affect the
host system. This allows pip to install development tools (black, flake8,
isort) globally within the container as intended.
Fixes devcontainer creation error that was preventing environment setup.
21500dc791