Unblock CI by fixing lint/import ordering and package metadata compatibility

[Copilot]

CI was failing in the Lint job due to import ordering in tests. Once that was corrected, the packaging path exposed metadata incompatibilities between modern setuptools output and the workflow’s twine check expectations.

• Lint failure: import ordering in tests

  • Applied isort-compatible import grouping in:
    • tests/test_core.py
    • tests/test_parser.py
  • This aligns local files with the workflow rule isort --check-only --diff --profile black.

• Build/publish check compatibility

  • Updated packaging metadata in pyproject.toml to avoid generating metadata fields rejected by the current twine check path:
    • constrained build backend to setuptools>=61.0,<77
    • switched license declaration to table form ({ text = "MIT" })
    • removed deprecated license classifier entry

Example of the metadata adjustment:

[build-system]
requires = ["setuptools>=61.0,<77", "wheel"]

[project]
license = { text = "MIT" }
# removed: "License :: OSI Approved :: MIT License"

[Copilot]

Pull request overview

This PR unblocks the repository’s CI by aligning test import grouping with the isort --profile black check and adjusting packaging metadata/build backend constraints to pass the python -m build + twine check validation used in the workflow.

Changes:

• Add an isort-compatible blank line separating third-party and first-party imports in tests/test_core.py and tests/test_parser.py.
• Constrain the build backend requirement to setuptools>=61.0,<77 to avoid CI metadata-check incompatibilities.
• Update PEP 621 license metadata to license = { text = "MIT" } and remove the MIT license classifier entry.

Reviewed changes

Copilot reviewed 3 out of 3 changed files in this pull request and generated no comments.

File	Description
tests/test_parser.py	Adds import-section separation to satisfy isort in CI.
tests/test_core.py	Adds import-section separation to satisfy isort in CI.
pyproject.toml	Adjusts build-system requirement bounds and modernizes license metadata for twine check compatibility.

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