Fix backend infrastructure issues for results-service, series-service, and events-service; integrate @EnableDiscoveryClient and Consul support; convert Series domain entities to data class; and update Gradle dependencies and configurations.

backend/services/masterdata/masterdata-service/src/main/kotlin/at/mocode/masterdata/service/MasterdataServiceApplication.kt

@@ -2,6 +2,7 @@ package at.mocode.masterdata.service
 
 import org.springframework.boot.autoconfigure.SpringBootApplication
 import org.springframework.boot.runApplication
+import org.springframework.cloud.client.discovery.EnableDiscoveryClient
 
 /**
  * Main application class for the Masterdata Service.
@@ -9,6 +10,7 @@ import org.springframework.boot.runApplication
  * This service provides APIs for managing master data such as countries, regions, and other reference data.
  */
 @SpringBootApplication
+@EnableDiscoveryClient
 class MasterdataServiceApplication
 
 fun main(args: Array<String>) {