Add linting to the action

[tjgurwara99]

Closes https://github.com/github/code-scanning/issues/23716

This PR introduces linting in this repository so that the project follows python standards. We also introduce the usage of uv as a package manager, which would allow us to make sure that we have our dependencies in sync.

[Copilot]

Pull request overview

This PR adds Python linting/format checking via Ruff and adopts uv (with pyproject.toml + uv.lock) to manage and lock development dependencies, while updating existing Python code/tests to satisfy the new linting standards.

Changes:

• Introduces uv project configuration (pyproject.toml) and a lockfile (uv.lock) with Ruff as a dev dependency.
• Adds a dedicated lint workflow and updates CI to install dependencies via uv before running unit tests.
• Applies Ruff-driven formatting/typing cleanups across the Python source and unit tests.

Show a summary per file

File	Description
uv.lock	Adds uv lockfile to pin dev dependency resolution (Ruff).
pyproject.toml	Defines the uv project and Ruff configuration (lint + formatting rules).
.github/workflows/lint.yml	New workflow to run Ruff lint + format checks in CI.
.github/workflows/ci.yml	Updates CI to install uv + dev dependencies and run tests via uv run.
upload_coverage.py	Formatting/type-hint updates to comply with Ruff rules.
status_report.py	Formatting/type-hint updates to comply with Ruff rules.
categorised_error.py	Minor formatting fix to satisfy linting.
post_upload_coverage.py	Minor formatting (blank line) to satisfy linting.
test_upload_coverage.py	Formatting/modernization edits to satisfy linting.
test_status_report.py	Formatting edits to satisfy linting.
test_post_upload_coverage.py	Formatting edits to satisfy linting.
.gitignore	Ignores .venv/ and .ruff_cache/ created by new tooling.

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• Files reviewed: 10/12 changed files
• Comments generated: 3
• Review effort level: Low