fix: 소셜로그인시 유저 행동데이터 SIGN_UP 중복 기록 버그

- 소셜로그인 시 isNew 플래그를 통해 회원가입/로그인을 구분하여 SIGN_UP 중복 기록 버그 수정

src/main/kotlin/kr/co/vividnext/sodalive/member/MemberController.kt

@@ -351,11 +351,13 @@ class MemberController(
             )
         }
 
-        userActionService.recordAction(
-            memberId = response.memberId,
-            actionType = ActionType.SIGN_UP,
-            pushToken = request.pushToken
-        )
+        if (response.isNew) {
+            userActionService.recordAction(
+                memberId = response.memberId,
+                actionType = ActionType.SIGN_UP,
+                pushToken = request.pushToken
+            )
+        }
 
         return ApiResponse.ok(message = "회원가입을 축하드립니다.", data = response.loginResponse)
     }
@@ -380,11 +382,13 @@ class MemberController(
             )
         }
 
-        userActionService.recordAction(
-            memberId = response.memberId,
-            actionType = ActionType.SIGN_UP,
-            pushToken = request.pushToken
-        )
+        if (response.isNew) {
+            userActionService.recordAction(
+                memberId = response.memberId,
+                actionType = ActionType.SIGN_UP,
+                pushToken = request.pushToken
+            )
+        }
 
         return ApiResponse.ok(message = "회원가입을 축하드립니다.", data = response.loginResponse)
     }