GH-214: [feat] Add ObservationConfig for micrometer observation support.

Microservices/email-service/src/main/java/app/sportahub/emailservice/config/ObservationConfig.java

@@ -0,0 +1,15 @@
+package app.sportahub.emailservice.config;
+
+import io.micrometer.observation.ObservationRegistry;
+import io.micrometer.observation.aop.ObservedAspect;
+import org.springframework.context.annotation.Bean;
+import org.springframework.context.annotation.Configuration;
+
+@Configuration
+public class ObservationConfig {
+
+    @Bean
+    ObservedAspect observedAspect(ObservationRegistry observationRegistry) {
+        return new ObservedAspect(observationRegistry);
+    }
+}

Microservices/event-service/src/main/java/app/sportahub/eventservice/config/ObservationConfig.java

@@ -0,0 +1,13 @@
+import io.micrometer.observation.ObservationRegistry;
+import io.micrometer.observation.aop.ObservedAspect;
+import org.springframework.context.annotation.Bean;
+import org.springframework.context.annotation.Configuration;
+
+@Configuration
+public class ObservationConfig {
+
+    @Bean
+    ObservedAspect observedAspect(ObservationRegistry observationRegistry) {
+        return new ObservedAspect(observationRegistry);
+    }
+}

Microservices/gateway/src/main/java/app/sportahub/gateway/config/ObservationConfig.java

@@ -0,0 +1,13 @@
+import io.micrometer.observation.ObservationRegistry;
+import io.micrometer.observation.aop.ObservedAspect;
+import org.springframework.context.annotation.Bean;
+import org.springframework.context.annotation.Configuration;
+
+@Configuration
+public class ObservationConfig {
+
+    @Bean
+    ObservedAspect observedAspect(ObservationRegistry observationRegistry) {
+        return new ObservedAspect(observationRegistry);
+    }
+}

Microservices/user-service/src/main/java/app/sportahub/userservice/config/ObservationConfig.java

@@ -0,0 +1,15 @@
+package app.sportahub.userservice.config;
+
+import io.micrometer.observation.ObservationRegistry;
+import io.micrometer.observation.aop.ObservedAspect;
+import org.springframework.context.annotation.Bean;
+import org.springframework.context.annotation.Configuration;
+
+@Configuration
+public class ObservationConfig {
+
+    @Bean
+    ObservedAspect observedAspect(ObservationRegistry observationRegistry) {
+        return new ObservedAspect(observationRegistry);
+    }
+}