Post-hoc /trekreview of S4.2 surfaced two confirmed findings; both closed via TDD.
S42-001 (MAJOR): the new --live-dry-run CLI tests read PORTFOLIO_MODEL_MAP /
PORTFOLIO_FOUNDRY_PROJECT_ENDPOINT via resolve_model/AzureFoundryBackend but did
not isolate them, so both arms inverted their rc in a Foundry-configured env.
Add an autouse fixture that delenvs both, mirroring test_backends/test_preflight.
S42-002 (MINOR): the --live-dry-run except ValueError attached the azure-preflight
remediation to every offline-path ValueError (unknown project_id, empty docs_dir,
bundle mismatch). Scope the hint to args.profile == "azure"; structured refusal +
rc 1 preserved for all. New test proves a LOCAL unknown-project refusal carries no
azure hint.
Gate: pytest 358 passed / 4 skipped, ruff check + format clean, mypy 24 files.
