fix: Setting the 'isMember' Property During Notification Sending to E…

…nsure Accurate Workspace Membership Verification - EXO-69364 - Meeds-io/meeds#1651

Before this change, users who were not members of a specific workspace
would receive notifications with the 'isMember' property set to null.
After this change, the 'isMember' property now returns the correct value
when users interact with notifications.

(cherry picked from commit c51b9ad)

component/service/src/main/java/org/exoplatform/social/rest/api/EntityBuilder.java

@@ -752,6 +752,9 @@ public static SpaceEntity buildEntityFromSpace(Space space, String userId, Strin
       spaceEntity.setIsManager(isManager);
       spaceEntity.setIsRedactor(spaceService.isRedactor(space, userId));
       spaceEntity.setIsPublisher(spaceService.isPublisher(space, userId));
+    } else if (space != null && StringUtils.isNotBlank(space.getId())) {
+      Identity currentUserIdentity = RestUtils.getCurrentUserIdentity();
+      spaceEntity.setIsMember(spaceService.isMember(space, currentUserIdentity.getRemoteId()));
     }
 
     PortalConfig portalConfig = getLayoutService().getPortalConfig(new SiteKey(GROUP, space.getGroupId()));