Tempo 2.10 release: new TraceQL features, LLM-optimized API responses, vParquet5, and more

Tempo 2.10 introduces several new features and enhancements, including advancements in TraceQL, the query language for trace selection, and improved cardinality management for the metrics-generator. Notable updates include the span:childCount intrinsic for analyzing trace structures, a new = nil operator for identifying missing attributes, and a simplified JSON format for LLM-optimized API responses. The release also enhances metrics generation with the introduction of entity-based limiting mode and the metric_overflow label to manage series overflow. Furthermore, the optional vParquet5 format improves query speed and storage efficiency, with dedicated attribute columns allowing for greater flexibility. The release is part of an ongoing effort to refine Tempo's architecture, with Project Rhythm promising scalability and reduced costs. Users can explore these updates in detail through the changelog and release notes, while Grafana Labs encourages community engagement via various platforms.