Update nac-test dependency constraint to >=2.0 after PyPI release

[oboehmer]

Context

As part of resolving the circular dependency (see #19), we temporarily removed the version constraint from the nac-test dependency in pyproject.toml:

dependencies = [
    "httpx>=0.28",
    "nac-test",  # No version constraint during development
]

This allows flexibility during development when devs have nac-test installed in dev mode.

Task

Once nac-test v2.0 is released to PyPI, update the dependency constraint to:

dependencies = [
    "httpx>=0.28",
    "nac-test>=2.0",  # Require v2.0+ which includes PyATS functionality
]

Why This Matters

• Ensures users get a compatible version of nac-test from PyPI
• Prevents installation of old nac-test versions that lack PyATS functionality
• Follows semantic versioning best practices

Checklist

• Wait for nac-test v2.0 to be published to PyPI
• Update pyproject.toml with version constraint
• Remove TODO comment
• Test installation from PyPI
• Release new version of nac-test-pyats-common

Related Issues

• Resolve circular dependency: Make nac-test a direct dependency in nac-test repo #19 - Parent issue about circular dependency resolution
• Resolve circular dependency: Add nac-test-pyats-common as direct dependency nac-test#489