Release v1.42.0/v0.64.0/v0.18.0/v0.0.16

[pellared]

Added

• Add go.opentelemetry.io/otel/semconv/v1.40.0 package.
  The package contains semantic conventions from the v1.40.0 version of the OpenTelemetry Semantic Conventions.
  See the migration documentation for information on how to upgrade from go.opentelemetry.io/otel/semconv/v1.39.0. (Revert "Revert "Generate semconv/v1.40.0"" #7985)
• Add Err and SetErr on Record in go.opentelemetry.io/otel/log to attach an error and set record exception attributes in go.opentelemetry.io/otel/log/sdk. (log: add error field to Record and make SDK to emit exception attributes #7924)

Changed

• TracerProvider.ForceFlush in go.opentelemetry.io/otel/sdk/trace joins errors together and continues iteration through SpanProcessors as opposed to returning the first encountered error without attempting exports on subsequent SpanProcessors. (TracerProvider ForceFlush() Error Fix #7856)

Fixed

• Fix missing request.GetBody in go.opentelemetry.io/otel/exporters/otlp/otlpmetric/otlpmetrichttp to correctly handle HTTP2 GOAWAY frame. (support stdlib request.GetBody on metrics #7931)
• Fix semconv v1.39.0 generated metric helpers skipping required attributes when extra attributes were empty. (fix: generated semconv helpers skipping attributes #7964)
• Preserve W3C TraceFlags bitmask (including the random Trace ID flag) during trace context extraction and injection in go.opentelemetry.io/otel/propagation. (Feat: Have SpanContext support the new W3C random flag. #7834)

Removed

• Drop support for [Go 1.24]. (Drop support for Go 1.24 #7984)

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 81.6%. Comparing base (6059c47) to head (54ae6ac).
⚠️ Report is 1 commits behind head on main.

Additional details and impacted files

@@          Coverage Diff          @@
##            main   #8006   +/-   ##
=====================================
  Coverage   81.6%   81.6%           
=====================================
  Files        304     304           
  Lines      23424   23424           
=====================================
  Hits       19128   19128           
  Misses      3908    3908           
  Partials     388     388           

Files with missing lines	Coverage Δ
bridge/opencensus/version.go	100.0% <100.0%> (ø)
...xporters/otlp/otlpmetric/otlpmetricgrpc/version.go	100.0% <100.0%> (ø)
...xporters/otlp/otlpmetric/otlpmetrichttp/version.go	100.0% <100.0%> (ø)
exporters/otlp/otlptrace/version.go	100.0% <100.0%> (ø)
sdk/metric/version.go	100.0% <100.0%> (ø)
sdk/version.go	100.0% <100.0%> (ø)
version.go	100.0% <100.0%> (ø)

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