Lock EdgeEnv regression handoff shape

[hyeokjun32]

Summary

• Tighten telemetry replay to regression smoke assertions for the EdgeEnv report artifact shape consumed by downstream diagnosis/report layers.
• Document optional AIGuard CLI consumption as a cross-repo artifact handoff, not an EdgeEnv dependency.

Validation

• python -m pytest -q tests/test_regression.py::test_cli_telemetry_replay_to_regression_smoke
• python -m pytest -q
• git diff --check