v0.4.3 - Package Version Alignment & PyPI Distribution

What's Changed in v0.4.3

📦 Package & Distribution Patch

• Version Alignment: Bumped project and package version to 0.4.3 across pyproject.toml, src/nexusai_client/__init__.py, and uv.lock.
• PyPI Distribution: Synchronized distribution metadata and published wheel / sdist artifacts for PyPI.
• Documentation Alignment: Synchronized package version badges and documentation references following the v0.4.2 Dynamic Model Management release.

Full Changelog: v0.4.2...v0.4.3