Fix/code quality checks

[DeepKnowledge1]

🔗 Related Issue

📝 Description

• Added comprehensive code quality enforcement infrastructure with pre-commit hooks and GitHub Actions CI
• Configured Black (formatting), isort (import sorting), flake8 (linting), and pytest to run on every commit
• Fixed all critical flake8 violations across the codebase (bare exceptions, unused f-strings, duplicate imports)
• Created CONTRIBUTING.md with detailed development guidelines, setup instructions, and code quality standards
• Established lenient but consistent flake8 rules that allow common Python patterns while blocking actual bugs
• Added CI workflow with mandatory code-quality gate that blocks merges when quality checks fail

🔄 Type of Change

• 🐛 Bug fix (non-breaking change which fixes an issue)
• 🚀 New feature (non-breaking change which adds functionality)
• 💥 Breaking change (fix or feature that would cause existing functionality to not work as expected)
• 📖 Documentation update
• 🏗️ Infrastructure / CI/CD update

🧪 Hardware & Matrix Testing

I have successfully built and tested this code using uv on:

• anomavision[cpu] (Standard/Edge)
• anomavision[cu121] (CUDA 12.1)
• anomavision[cu124] (CUDA 12.4)
• anomavision[cu118] (CUDA 11.8)

Host OS used for testing:

• Linux / Ubuntu
• Windows (Native or WSL2)
• macOS

✅ Developer Checklist

• My code follows the core style guidelines of this project (Ruff/Black formatting).
• I have run uv run pytest and all unit tests pass locally.
• Lockfile Guard: If I added or modified a dependency in pyproject.toml, I have run uv lock --python 3.10 and committed the updated uv.lock file.
• I have added tests that prove my fix is effective or that my feature works.
• I have updated the documentation accordingly (if applicable).

📸 Screenshots / Visual Proof (Optional)

Pre-commit hooks passing:

black....................................................................Passed
isort....................................................................Passed
flake8...................................................................Passed
fix end of files.........................................................Passed
trim trailing whitespace.................................................Passed
Run pytest..............................................................Passed

Files added/modified:

• .pre-commit-config.yaml - Pre-commit hook configuration
• .flake8 - Flake8 linting rules
• .github/workflows/ci.yml - Updated with code-quality job
• CONTRIBUTING.md - Developer guidelines (new)
• pyproject.toml - Added dev dependencies and tool configs
• Multiple files - Fixed critical flake8 violations (F811 redefinitions, E722 bare excepts)