[prabhjot1028]

The abbreviated rf fixture can be hard to discover or understand when reading tests. Add request_factory as a descriptive alias while preserving rf and its existing behavior.

The alias depends on and returns rf, so requesting both names uses the same RequestFactory instance and respects local rf overrides. Register and export the fixture, document its use, and add a changelog entry.

Tests cover constructing a GET request through the new name and object identity when both fixtures are requested. Both new tests first failed with fixture 'request_factory' not found against the original library.

Validation on Windows with Python 3.13.7, Django 5.2.18, and pytest 9.1.1:

• Fixture module: python -m pytest tests/test_fixtures.py --ds=pytest_django_test.settings_sqlite — 56 passed.
• Full SQLite suite: python -m pytest --ds=pytest_django_test.settings_sqlite — 242 passed, 2 skipped.
• python -m build, python -m compileall -q pytest_django, and python -m pip check.
• Ruff lint and format checks, mypy, pyupgrade, EditorConfig, workflow lint, and sphinx-build -n -W.

The unchanged baseline passed 240 tests with 2 expected SQLite skips after preserving LF checkout endings on Windows. No database services were required for the local verification.

Fixes #1252

AI assistance: developed with assistance from OpenAI Codex.