{"message":"Kotlin FHIRPath server is running!","endpoints":{"/health":"GET - Health check","/kotlin-fhirpath-config.json":"GET - FHIRPath Lab custom engine configuration","/fhirpath-r4":"POST - Evaluate R4 FHIRPath expressions","/fhirpath-r4b":"POST - Evaluate R4B FHIRPath expressions","/fhirpath-r5":"POST - Evaluate R5 FHIRPath expressions"}}