Refactor test files to use pytest fixtures for improved maintainability

[Copilot]

Summary

This PR refactors several test files to use pytest fixtures instead of setUp methods and repetitive object creation. This improves test maintainability, readability, and reusability while preserving compatibility with Django's test runner.

Changes

• Added pytest configuration (pytest.ini)
• Created module-specific fixture collections in conftest.py files for:
  • qatrack/attachments/tests
  • qatrack/qa/tests
  • qatrack/reports/tests
  • qatrack/notifications/qccompleted
  • qatrack/notifications/service_log_scheduling
• Refactored test classes to use fixtures instead of setUp methods
• Added proper docstrings to test methods
• Maintained backward compatibility with Django's TestCase

Benefits

1. Improved Maintainability: Common test setup code is now shared via fixtures rather than duplicated across test methods.
2. Better Readability: Test methods now focus on assertions rather than setup, making their intent clearer.
3. Enhanced Reusability: Fixtures can be reused across different test modules.
4. Dual Compatibility: Tests work with both Django's test runner and pytest.
5. Easier Test Modifications: Changes to test objects only need to be made in one place.

Example

Before:

def test_something(self):
    site = USite.objects.create(name="site")
    unit = utils.create_unit(site=site)
    utc = utils.create_unit_test_collection(unit=unit)
    # Test logic here

After:

def test_something(self, site, unit):
    """Test description here."""
    utc = utils.create_unit_test_collection(unit=unit)
    # Test logic here

Related Files

• qatrack/attachments/tests/test_models.py
• qatrack/qa/tests/test_utils.py
• qatrack/qa/tests/test_tags.py
• qatrack/reports/tests/test_qc.py
• And newly created conftest.py files in various directories

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