chore: add serializable tag do entities

Author: andrea-acampora

src/main/kotlin/entity/healthprofessional/HealthProfessionalData.kt

@@ -8,12 +8,15 @@
 
 package entity.healthprofessional
 
+import kotlinx.serialization.Serializable
+
 /**
  * Module with all the Health Professionals data.
  */
 object HealthProfessionalData {
 
     /** The health professional model. */
+    @Serializable
     data class HealthProfessional(
         /** The health professional id. */
         val healthProfessionalId: String,

src/main/kotlin/entity/user/User.kt

@@ -10,8 +10,10 @@ package entity.user
 
 import entity.user.UserData.PASSWORD_MAX_LENGTH
 import entity.user.UserData.PASSWORD_MIN_LENGTH
+import kotlinx.serialization.Serializable
 
 /** The user of the Smart Operating block System. */
+@Serializable
 data class User(
 
     /** The identifier of the [User]. */