- Fix undefined variable 'e' in PDF generator error handling
- Replace undefined 'Verpachtung' model references with 'LandVerpachtung'
- Fix all import and object access references to use correct model name
- Resolve all flake8 F821 undefined name errors
This addresses all code quality failures that were blocking CI pipeline.
- Remove app/.venv from git tracking (should not be committed)
- Update flake8 to only scan project code (app/stiftung, app/core)
- Update black and isort to only check project code
- Update bandit security scanning to only check project code
- Excludes third-party packages that cause linting failures
- Add dotenv loading to Django settings
- Update CI workflow to use correct environment variables
- Set POSTGRES_* variables instead of DATABASE_URL
- Add environment variables to all Django management commands
- Fixes CI test failures due to database connection issues
