Version 1.2.3

[heberlr]

This pull request introduces several improvements and updates across the codebase, primarily focused on licensing, documentation, testing, and database utilities. The most notable changes include the adoption of the BSD 3-Clause License, enhancements to the release and documentation workflow, expanded database testing, and updates to metadata and badges for clarity and compliance.

Licensing and Metadata Updates:

• Added the BSD 3-Clause License to the project (uq_physicell/LICENSE.md) and updated the license reference in pyproject.toml to point to this file, replacing the previous MIT license reference. [1] [2]
• Updated the PyPI badge in README.md to reflect the new release date and added a license badge for visibility.

Release and Documentation Workflow Improvements:

• Revised the release workflow instructions in pyproject.toml to clarify the steps for versioning, documentation updates, and PyPI publishing, including explicit reminders not to create a new version if there are no changes in the core module.

Testing and Database Utilities:

• Added a comprehensive test suite for model analysis database functions in tests/test_ma_database.py, covering database creation, insertion, and modular load functions for improved reliability and coverage.
• Updated the uq_physicell/database/__init__.py to import and expose key database modules and utility functions, enabling convenient dot notation access and simplifying usage.
• Corrected column names in test data for Bayesian optimization utilities to match expected lowercase format.

Release Versioning and Documentation:

• Bumped the package version from 1.2.2 to 1.2.3 in uq_physicell/VERSION.py and updated documentation references to the new release version. [1] [2]

CI/CD Workflow Adjustment:

• Changed the unit test workflow trigger to run only on pull requests, not on every push, for more focused CI/CD runs. (.github/workflows/test-examples.yml)

These changes collectively improve the project's compliance, maintainability, and reliability, while making the release and documentation process clearer for contributors.