build(py/genkit): switch to ty for stricter and faster type checks

[yesudeep]

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[gemini-code-assist]

Summary of Changes

Hello @yesudeep, I'm Gemini Code Assist¹! I'm currently reviewing this pull request and will post my feedback shortly. In the meantime, here's a summary to help you and other reviewers quickly get up to speed!

This pull request focuses on enhancing the codebase's type safety by migrating the Python type checking infrastructure from mypy to ty. This change aims to leverage ty's capabilities for more rigorous type enforcement, ensuring higher code quality and reducing potential runtime errors. The modifications span across build scripts, development environment configurations, and dependency declarations to fully integrate the new type checker.

Highlights

• Type Checker Migration: The project's Python type checker has been switched from mypy to ty to enable stricter type checks.
• Build Script Updates: The bin/run_lint script and py/noxfile.py now invoke ty check instead of mypy for type verification.
• Dependency Management: The py/pyproject.toml and py/uv.lock files have been updated to remove mypy as a linting dependency and include ty.
• Configuration Removal: The dedicated [tool.mypy] configuration section has been removed from py/pyproject.toml as it is no longer needed.

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Ignored Files

• Ignored by pattern: .github/workflows/** (1)
  • .github/workflows/python.yml

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[gemini-code-assist]

Code Review

This pull request switches the Python type checker from mypy to ty for stricter type checks. The changes correctly update the project dependencies, remove the old mypy configuration, and modify the linting scripts to use ty. The implementation is solid, but I have one suggestion to ensure consistency across different linting environments.