feat: vereinheitliche Startup-Logs in allen Backend-Services, verbessere Konsistenz und Diagnosemöglichkeiten

Signed-off-by: StefanMoCoAt <stefan.mo.co@gmail.com>

backend/services/events/events-service/src/main/kotlin/at/mocode/events/service/EventsServiceApplication.kt

@@ -1,8 +1,12 @@
 package at.mocode.events.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 Events Service.
@@ -11,7 +15,22 @@ import org.springframework.cloud.client.discovery.EnableDiscoveryClient
  */
 @SpringBootApplication
 @EnableDiscoveryClient
-class EventsServiceApplication
+class EventsServiceApplication(private val env: Environment) {
+
+  private val log = LoggerFactory.getLogger(EventsServiceApplication::class.java)
+
+  @EventListener(ApplicationReadyEvent::class)
+  fun onApplicationReady() {
+    val springPort = env.getProperty("server.port", "8085")
+    val appName = env.getProperty("spring.application.name", "events-service")
+
+    log.info("----------------------------------------------------------")
+    log.info("Application '{}' is running!", appName)
+    log.info("Spring Management Port: {}", springPort)
+    log.info("Profiles:               {}", env.activeProfiles.joinToString(", "))
+    log.info("----------------------------------------------------------")
+  }
+}
 
 /**
  * Main entry point for the Events Service application.