test: add no-network and install profile gates

[sidmohan0]

Summary

• add no-network core import/scan/redact tests for DFPY-19
• add install-profile smoke coverage for core, cli, nlp, nlp-advanced, ocr, distributed, and web for DFPY-20
• remove the phantom rich dependency from the spaCy helper and declare certifi/numpy where image/web paths use them
• add docs/v5-model-requirements.md as the model-selection requirements sheet

Validation

• .venv313/bin/pre-commit run --all-files --show-diff-on-failure
• .venv313/bin/python -m pytest tests/test_no_network_core.py tests/test_runtime_dependency_safety.py tests/test_install_profiles.py -q
• DATAFOG_INSTALL_PROFILE=core .venv313/bin/python -m pytest tests/test_install_profiles.py -q
• DATAFOG_INSTALL_PROFILE=cli .venv313/bin/python -m pytest tests/test_install_profiles.py -q
• .venv313/bin/python -m pytest tests/ -m "not slow" --ignore=tests/test_image_service.py --ignore=tests/test_ocr_integration.py --ignore=tests/test_spark_integration.py --ignore=tests/test_text_service_integration.py -q
• .venv313/bin/python setup.py egg_info
• dry-run installs for .[ocr], .[web], and .[distributed]