Partial cherry-pick of a7ffbbff7 from PR #63256: secondary-profile
adapter creation errors no longer abort the whole secondary startup
(try/except around _create_adapter + loud warning on None return), and
Home Assistant's check_ha_requirements() becomes dep-only with the
credential moved to a new validate_ha_config() so secondary profiles
whose HASS_TOKEN lives in the profile secret scope are not silently
dropped by the registry gate.
Telegram diagnostic hunks and profile-label stamping dropped: the
regression they targeted does not exist on current main and they
conflict with the connect() teardown fence.
bd44ef8645