The served-profiles block in _start_secondary_profile_adapters references
PairingStore, but the class's only import in gateway/run.py is method-local
inside __init__ — so the reference raised NameError at runtime, silently
swallowed by the enclosing try/except ('could not record served_profiles').
Result: multiplexing gateways never created per-profile pairing stores, and
authz pairing checks for secondary profiles fell through to the global
whitelist. Also masked the served_profiles runtime-status write.
One-line fix (local import alongside write_runtime_status) + regression
tests that drive the real method and assert the stores materialize,
verified red without the import and green with it.
Surfaced during the profile-routing sweep by @CocaKova's PR #61689, which
included the same fix as part of a larger feature.
5f1991bf6b