chore: user can rejoin a project by invite

apiserver/plane/app/views/project.py

@@ -679,6 +679,25 @@ class ProjectMemberViewSet(BaseViewSet):
                 )
             )
 
+            # Check if the user is already a member of the project and is inactive
+            if ProjectMember.objects.filter(
+                workspace__slug=slug,
+                project_id=project_id,
+                member_id=member.get("member_id"),
+                is_active=False,
+            ).exists():
+                member_detail = ProjectMember.objects.get(
+                    workspace__slug=slug,
+                    project_id=project_id,
+                    member_id=member.get("member_id"),
+                    is_active=False,
+                )
+                # Check if the user has not deactivated the account
+                user = User.objects.filter(pk=member.get("member_id")).first()
+                if user.is_active:
+                    member_detail.is_active = True
+                    member_detail.save(update_fields=["is_active"])
+
         project_members = ProjectMember.objects.bulk_create(
             bulk_project_members,
             batch_size=10,