Version 2.7.1

This patch release improves installation and solver compatibility.

Fixed

• FINE can now be imported and used without gurobipy installed. Gurobi
  availability is checked lazily when solver detection runs.
• Improved the numerical robustness of the ConversionDynamic minimum-downtime
  test when using the HiGHS solver.
• Skip performance summary test when Gurobi is unavailable

Documentation

• Updated the recommended Conda installation command to install Gurobi from its
  dedicated channel with strict channel priority.
• Updated the README logo links to use centrally hosted assets.

Maintenance

• Bumped the package version from 2.7.0 to 2.7.1.
• Added Ruff annotations for the intentional lazy import.

Full changelog: v2.7.0...v2.7.1