Remove outdated BillingController implementation, resolve conflicting bean definitions across modules, and retain the updated BillingController for consistency with frontend API logic.

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

@@ -1,8 +1,12 @@
 package at.mocode.masterdata.service
 
+import org.slf4j.LoggerFactory
 import org.springframework.boot.autoconfigure.SpringBootApplication
+import org.springframework.boot.context.event.ApplicationReadyEvent
 import org.springframework.boot.runApplication
 import org.springframework.cloud.client.discovery.EnableDiscoveryClient
+import org.springframework.context.event.EventListener
+import org.springframework.core.env.Environment
 
 /**
  * Main application class for the Masterdata Service.
@@ -11,7 +15,24 @@ import org.springframework.cloud.client.discovery.EnableDiscoveryClient
  */
 @SpringBootApplication
 @EnableDiscoveryClient
-class MasterdataServiceApplication
+class MasterdataServiceApplication(private val env: Environment) {
+
+  private val log = LoggerFactory.getLogger(MasterdataServiceApplication::class.java)
+
+  @EventListener(ApplicationReadyEvent::class)
+  fun onApplicationReady() {
+    val springPort = env.getProperty("server.port", "8086")
+    val ktorPort = env.getProperty("masterdata.http.port", "8091")
+    val appName = env.getProperty("spring.application.name", "masterdata-service")
+
+    log.info("----------------------------------------------------------")
+    log.info("Application '{}' is running!", appName)
+    log.info("Spring Management Port: {}", springPort)
+    log.info("Ktor API Port:          {}", ktorPort)
+    log.info("Profiles:               {}", env.activeProfiles.joinToString(", "))
+    log.info("----------------------------------------------------------")
+  }
+}
 
 fun main(args: Array<String>) {
   // Starte die Spring Boot Anwendung.

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

@@ -54,6 +54,14 @@ class KtorServerConfiguration {
       )
     }
     engine.start(wait = false)
+
+    // Graceful Shutdown sicherstellen
+    Runtime.getRuntime().addShutdownHook(Thread {
+      log.info("Stopping Masterdata Ktor server...")
+      engine.stop(3000, 5000)
+      log.info("Masterdata Ktor server stopped.")
+    })
+
     return engine
   }
 }

backend/services/masterdata/masterdata-service/src/main/resources/application.yml

@@ -19,12 +19,13 @@ spring:
       discovery:
         enabled: ${CONSUL_ENABLED:true}
         register: ${CONSUL_ENABLED:true}
+        prefer-ip-address: true # Nutze IP im Docker-Netzwerk
         health-check-path: /actuator/health
         health-check-interval: 10s
-        health-check-port: 8086
-        instance-id: ${spring.application.name}-${server.port}-${random.uuid}
+        health-check-port: ${server.port} # Health Check läuft auf Spring Port
+        instance-id: ${spring.application.name}:${server.port}:${random.uuid}
         service-name: ${spring.application.name}
-        port: 8091
+        port: ${masterdata.http.port} # Ktor API Port registrieren
 
 server:
   port: 8086 # Spring Boot Management Port (Actuator & Tomcat)