feat: Database model & configuration

src/main/java/eu/ztsh/wymiana/data/entity/UserEntity.java

@@ -0,0 +1,29 @@
+package eu.ztsh.wymiana.data.entity;
+
+import jakarta.persistence.CascadeType;
+import jakarta.persistence.Entity;
+import jakarta.persistence.Id;
+import jakarta.persistence.OneToMany;
+import jakarta.persistence.Table;
+import lombok.AllArgsConstructor;
+import lombok.Data;
+import lombok.NoArgsConstructor;
+
+import java.util.List;
+
+@Data
+@NoArgsConstructor
+@AllArgsConstructor
+@Entity
+@Table(name = "user")
+public class UserEntity {
+
+    @Id
+    String pesel;
+    String name;
+    String surname;
+
+    @OneToMany(cascade = CascadeType.ALL, mappedBy = "pesel")
+    List<CurrencyEntity> currencies;
+
+}