log usage of sort by projects

Author: lynnagara

src/sentry/core/endpoints/organization_index.py

@@ -208,6 +208,7 @@ def _get_from_cell(self, request: Request) -> Response:
             order_by = "-member_count"
             paginator_cls = OffsetPaginator
         elif sort_by == "projects":
+            sentry_sdk.capture_message("organization_index.sort_by_projects_used")
             queryset = queryset.annotate(project_count=Count("project"))
             order_by = "-project_count"
             paginator_cls = OffsetPaginator