feat: add profile image to employee

backend/src/main/java/com/srsystem/entity/Employee.java

@@ -77,6 +77,9 @@ public class Employee extends BaseEntity {
     @Column(name = "residence", length = 255)
     private String residence;
 
+    @Column(name = "profile_image", length = 500)
+    private String profileImage;
+
     @OneToMany(mappedBy = "employee", cascade = CascadeType.ALL, orphanRemoval = true)
     @OrderBy("sortOrder ASC")
     private List<EmployeeEmergencyContact> emergencyContacts;