MOSU refactor: set secure flag to true for development cookies

Author: wlgns12370

src/main/java/life/mosu/mosuserver/global/util/CookieBuilderUtil.java

@@ -65,7 +65,7 @@ public static String createLocalCookieString(String name, String value, Long max
     public static ResponseCookie createDevelopResponseCookie(String name, String value,
             Long maxAge) {
         return createBaseResponseCookieBuilder(name, value, maxAge)
-                .secure(false)
+                .secure(true)
                 .domain(".mosuedu.com")
                 .sameSite("Strict")
                 .build();