feat: Subscriberにinit関数を追加

hideout-core/src/main/kotlin/dev/usbharu/hideout/core/application/domainevent/subscribers/Subscriber.kt

@@ -1,3 +1,5 @@
 package dev.usbharu.hideout.core.application.domainevent.subscribers
 
-interface Subscriber
+interface Subscriber {
+    fun init()
+}

hideout-core/src/main/kotlin/dev/usbharu/hideout/core/application/domainevent/subscribers/SubscriberRunner.kt

@@ -5,7 +5,8 @@ import org.springframework.boot.ApplicationRunner
 import org.springframework.stereotype.Component
 
 @Component
-class SubscriberRunner(subscribers: List<Subscriber>) : ApplicationRunner {
+class SubscriberRunner(private val subscribers: List<Subscriber>) : ApplicationRunner {
     override fun run(args: ApplicationArguments?) {
+        subscribers.forEach { it.init() }
     }
 }