Description

Switches configuration models from Python dataclasses to Pydantic BaseModels. Since dataclasses don't provide type validation, we previously used tosholi to do type validation, but Pydantic provides better type validation support and better maintenance. Because tosholi is no longer needed, I've added the proxystore.utils.config module with TOML configuration file loading/dumping.

Fixes

• Fixes Switch from tosholi to pydantic for config loading #443

Type of Change

• Breaking Change (fix or enhancement which changes existing semantics of the public interface)
• Enhancement (new features or improvements to existing functionality)
• Bug (fixes for a bug or issue)
• Internal (refactoring, style changes, testing, optimizations)
• Documentation update (changes to documentation or examples)
• Package (dependencies, versions, package metadata)
• Development (CI workflows, pre-commit, linters, templates)
• Security (security related changes)

Testing

Added new unit tests where relevant and updated old unit tests. Also verified that endpoint config loading worked from the CLI with new and old configs.

Pull Request Checklist

• I have read the Contributing and PR submission guides.

Please confirm the PR meets the following requirements.

• Tags added to PR (e.g., breaking, bug, enhancement, internal, documentation, package, development, security).
• Code changes pass pre-commit (e.g., mypy, ruff, etc.).
• Tests have been added to show the fix is effective or that the new feature works.
• New and existing unit tests pass locally with the changes.
• Docs have been updated and reviewed if relevant.