GET /api/health/features lived in booking-import, which meant the client's
capability probe was reachable only because that domain happened to be
registered. Move it to health/ and give health an actual module instead of
two loose entries in app.module.
The extractor probe follows into a leaf module rather than health importing
BookingImportModule: features() needs isAvailable(), not llm-parse,
reservations, budget, maps and places.
The /api/_nest/{health,me,echo} smoke endpoints go. They proved boot, DI,
the cookie guard and the Zod pipe back when nothing else did; every one of
those now has real domain coverage, and nothing outside their own test ever
called them. The container probe is GET /api/health on the raw express layer
and is untouched.
jubnl