v0.2.4 — CI, new LLM models, and bug fixes

1. Main CI workflow

• Adds a GitHub Actions workflow for the main branch
• Runs unit and integration tests on:
  • pull requests to main
  • pushes to main
• Uses a fixed Python version for reproducibility
• Publishes releases to PyPI only on version tags (v*)

2. Extended LLM model support

• Adds support for new LLM models

3. Bug fix