Add startup fix for scheduling-service: configure application.yml, set service port to 8089, include spring-boot-starter-actuator for health checks, and document changes.

backend/services/scheduling/scheduling-service/build.gradle.kts

@@ -21,6 +21,7 @@ dependencies {
   implementation(libs.bundles.jackson.kotlin)
   implementation(libs.kotlin.reflect)
   implementation(libs.spring.cloud.starter.consul.discovery)
+  implementation(libs.spring.boot.starter.actuator)
   implementation(libs.caffeine)
   implementation(libs.spring.web)
   implementation(libs.bundles.resilience)

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

@@ -0,0 +1,28 @@
+spring:
+  application:
+    name: scheduling-service
+  datasource:
+    url: jdbc:postgresql://${DB_HOST:localhost}:${DB_PORT:5432}/${DB_NAME:pg-meldestelle-db}
+    username: ${DB_USER:pg-user}
+    password: ${DB_PASS:pg-pass}
+    driver-class-name: org.postgresql.Driver
+  cloud:
+    consul:
+      host: ${CONSUL_HOST:localhost}
+      port: ${CONSUL_PORT:8500}
+      discovery:
+        prefer-ip-address: true
+        instance-id: ${spring.application.name}:${random.value}
+        health-check-path: /actuator/health
+
+server:
+  port: 8089
+
+management:
+  endpoints:
+    web:
+      exposure:
+        include: "*"
+  endpoint:
+    health:
+      show-details: always