feat(fcm): 채팅 푸시 payload를 확장한다

src/test/kotlin/kr/co/vividnext/sodalive/fcm/FcmServiceTest.kt

@@ -0,0 +1,27 @@
+package kr.co.vividnext.sodalive.fcm
+
+import org.junit.jupiter.api.Assertions.assertEquals
+import org.junit.jupiter.api.DisplayName
+import org.junit.jupiter.api.Test
+
+class FcmServiceTest {
+    @Test
+    @DisplayName("메시지 푸시 data payload는 채팅 이동에 필요한 chat_type을 포함한다")
+    fun shouldBuildMessagePayloadWithChatType() {
+        val payload = FcmService.buildDataPayload(
+            roomId = 10L,
+            messageId = 204L,
+            contentId = null,
+            creatorId = null,
+            auditionId = null,
+            deepLinkValue = null,
+            deepLinkId = null,
+            deepLinkCommentPostId = null,
+            chatType = "USER_CREATOR"
+        )
+
+        assertEquals("10", payload["room_id"])
+        assertEquals("204", payload["message_id"])
+        assertEquals("USER_CREATOR", payload["chat_type"])
+    }
+}