• Fix SumAggregation  (#3390)
• Fix handling of empty metric collection cycles (#3335)
• Fix error when no LoggerProvider configured for LoggingHandler (#3423)
• Make opentelemetry_metrics_exporter entrypoint support pull exporters (#3428)
• Allow instrument names to have '/' and up to 255 characters (#3442)
• Do not load Resource on sdk import (#3447)
• Update semantic conventions to version 1.21.0 (#3251)
• Add missing schema_url in global api for logging and metrics (#3251)
• Prometheus exporter support for auto instrumentation (#3413)