{"ok":true,"name":"Healthcare API","version":"1.0.0","architecture":{"registryDb":"From MONGO_URI path (e.g. healthcare) — patient accounts & auth","patientTenantDbs":"One MongoDB database per patient (hc_pat_*) for large / tenant data"},"endpoints":{"health":"GET /","registerPatient":"POST /api/patients/register","getPatient":"GET /api/patients/:patientId","listOrLookup":"GET /api/patients?email=&limit="}}