added ProjectLinearizationChangedEvent to objectMapper

src/main/java/edu/stanford/protege/webprotege/gateway/websocket/config/ObjectMapperConfiguration.java

@@ -11,6 +11,7 @@
 import edu.stanford.protege.webprotege.change.OntologyChangedEvent;
 import edu.stanford.protege.webprotege.event.*;
 import edu.stanford.protege.webprotege.frame.*;
+import edu.stanford.protege.webprotege.gateway.websocket.config.events.ProjectLinearizationChangedEvent;
 import edu.stanford.protege.webprotege.hierarchy.EntityHierarchyChangedEvent;
 import edu.stanford.protege.webprotege.issues.CommentPostedEvent;
 import edu.stanford.protege.webprotege.issues.CommentUpdatedEvent;
@@ -313,6 +314,7 @@ public ObjectMapper objectMapper() {
                     OntologyBrowserTextChangedEvent.class,
                     PermissionsChangedEvent.class,
                     ProjectChangedEvent.class,
+                    ProjectLinearizationChangedEvent.class,
                     ProjectMovedToTrashEvent.class,
                     OntologyChangedEvent.class,
                     ProjectRemovedFromTrashEvent.class,

src/main/java/edu/stanford/protege/webprotege/gateway/websocket/config/events/ProjectLinearizationChangedEvent.java

@@ -0,0 +1,26 @@
+package edu.stanford.protege.webprotege.gateway.websocket.config.events;
+
+import com.fasterxml.jackson.annotation.JsonTypeName;
+import edu.stanford.protege.webprotege.common.*;
+import org.jetbrains.annotations.NotNull;
+
+import static edu.stanford.protege.webprotege.gateway.websocket.config.events.ProjectLinearizationChangedEvent.CHANNEL;
+
+@JsonTypeName(CHANNEL)
+public record ProjectLinearizationChangedEvent(EventId eventId,
+                                               ProjectId projectId) implements ProjectEvent {
+    public static final String CHANNEL = "webprotege.linearization.ProjectLinearizationChangedEvent";
+
+    public String getChannel() {
+        return CHANNEL;
+    }
+
+    public @NotNull EventId eventId() {
+        return this.eventId;
+    }
+
+    public @NotNull ProjectId projectId() {
+        return this.projectId;
+    }
+
+}