dev add context for notifcations

src/main/java/ru/soune/nocopy/entity/notification/Notification.java

@@ -42,6 +42,9 @@ public class Notification {
     @Column(name = "status")
     private NotificationStatus status = NotificationStatus.NEW;
 
+    @Column(name = "context", columnDefinition = "TEXT")
+    private String context;
+
     @ManyToOne(fetch = FetchType.LAZY)
     @JoinColumn(name = "user_id")
     @JsonIgnore