feat: deepen dns and storage command posture

[TacoRocket]

What changed

• deepen the \ command with private-endpoint reference context for private zones
• deepen the \ command with public-network, auth, transport, and protocol posture
• update help text, API mapping notes, fixtures, goldens, and terminal UX coverage to match the new output

Why

• improve operator-first triage without crossing into raw record dumps, content enumeration, or sensitive retrieval paths
• keep the dns and storage slices aligned with the same command-boundary review process used for other depth follow-ons

Validation

• python3 -m ruff check src tests scripts
• PYTHONPATH=src python3 scripts/generate_schemas.py
• PYTHONPATH=src python3 -m pytest tests/test_collectors.py tests/test_golden_outputs.py tests/test_contract_schemas.py tests/test_cli_smoke.py tests/test_help.py tests/test_terminal_ux.py tests/test_models.py -q
• PYTHONPATH=src python3 -m pytest -q