experimental/v0.29.0

💥 Breaking Change

• feat(metrics): metric readers and exporters now select aggregation temporality based on instrument type #2902 @seemk
• refactor(metrics-sdk): rename InstrumentationLibrary -> InstrumentationScope #2959 @pichlermarc
• feat(metrics): multi-instrument async callback support #2966 @legendecas
  • changes on meter.createObservableCounter, meter.createObservableGauge, meter.createObservableUpDownCounter
    • removed the second parameter callback
    • returns an Observable object on which callbacks can be registered or unregistered.
  • added meter.addBatchObservableCallback and meter.removeBatchObservableCallback.
• fix: remove attributes from OTLPExporterConfigBase #2991 @Flarna

🚀 (Enhancement)

• feat(exporters): update proto version and use otlp-transformer #2929 @pichlermarc
• fix(sdk-metrics-base): misbehaving aggregation temporality selector tolerance #2958 @legendecas
• feat(trace-otlp-grpc): configure security with env vars #2827 @svetlanabrennan
• feat(sdk-metrics-base): async instruments callback timeout #2742 @legendecas

🐛 (Bug Fix)

• fix(opentelemetry-instrumentation-http): use correct origin when port is null #2948 @danielgblanco
• fix(otlp-exporter-base): include esm and esnext in package files #2952 @dyladan
• fix(otlp-http-exporter): update endpoint to match spec #2895 @svetlanabrennan
• fix(instrumentation): only patch core modules if enabled #2993 @santigimeno
• fix(otlp-transformer): include esm and esnext in package files and update README #2992 @pichlermarc
• fix(metrics): specification compliant default metric unit #2983 @andyfleming