Add hibernate-jpa module: 40 runnable Hibernate 7 / JPA interview answers on PostgreSQL 16

Co-Authored-By: Claude Sonnet 5.5 <[email protected]>
Claude-Session: https://claude.ai/code/session_01Cfo2K4u4rF18QsPXPFnytf

hibernate-jpa/src/main/java/lab/hibernate/model/Account.java

@@ -0,0 +1,38 @@
+package lab.hibernate.model;
+
+import jakarta.persistence.*;
+
+@Entity
+public class Account {
+    @Id
+    @GeneratedValue
+    public Long id;
+    public String owner;
+    public long balance;
+
+    @Version
+    public int version;
+
+    protected Account() {}
+
+    public Account(String owner, long balance) {
+        this.owner = owner;
+        this.balance = balance;
+    }
+
+    public Long getId() {
+        return id;
+    }
+
+    public String getOwner() {
+        return owner;
+    }
+
+    public long getBalance() {
+        return balance;
+    }
+
+    public int getVersion() {
+        return version;
+    }
+}