Supplier Entity

@Entity
@Table(name = "SUPPLIER")
@Data
@NoArgsConstructor
@AllArgsConstructor
@Builder
public class Supplier {
    
    @Id
    @Column(name = "ID", nullable = false)
    private String id;  // UUID or custom ID
    
    @Column(name = "NAME", nullable = false, unique = true)
    private String name;  // Unique supplier name
    
    @Column(name = "CONTACT_NAME")
    private String contactName;  // Contact person
    
    @Column(name = "PHONE")
    private String phone;  // Phone number
    
    @Column(name = "EMAIL")
    private String email;  // Email address
    
    @Column(name = "CREATED_BY", nullable = false)
    private String createdBy;  // User who created
    
    @CreationTimestamp
    @Column(name = "CREATED_AT", nullable = false, updatable = false)
    private LocalDateTime createdAt;  // When created (immutable)
}