Grafana Tempo 2.8 release: memory improvements, new TraceQL features, and more

Grafana Tempo 2.8 lands with a bang. Say hello to TraceQL query hints—they bump up results you care about and streamline span searches with parent span IDs. Meanwhile, compactor pooling revamps slashes memory usage. Kiss those OOM errors goodbye. Important heads-up: serverless features are history and the default port is now 3200.