Fix style check failures by adding Flake8 config and applying Black formatting

[Copilot]

Style CI was failing because Flake8 wasn't reading configuration from pyproject.toml (it doesn't by default) and Black formatting hadn't been applied to the codebase.

Changes

• Added Flake8 config to setup.cfg matching pyproject.toml settings:

  [flake8]
  max-line-length = 96
  extend-ignore = E203, W503

• Applied Black formatting across 33 files

• Fixed Flake8 violations:

  • Removed unused imports (F401)
  • Fixed f-strings without placeholders (F541)
  • Removed/commented unused variables (F841)
  • Changed bare except: to except Exception: (E722)
  • Fixed line length and whitespace issues (E501, E231)

All 121 tests continue to pass.

Original prompt

why are the test and style failing

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