Release v1.19.0-rc.1/v0.42.0-rc.1

[MrAlias]

This is a release candidate for the v1.19.0/v0.42.0 release. That release is expected to include the v1 release of the OpenTelemetry Go metric SDK and will provide stability guarantees of that SDK. See our versioning policy for more information about these stability guarantees.

Changed

• Allow '/' characters in metric instrument names. (Allow '/' character in instrument names #4501)

Fixed

• In go.opentelemetry.op/otel/exporters/prometheus, don't try to create the Prometheus metric on every Collect if we know the scope is invalid. (Call scopeInfoMetrics only once even if it returns an error #4499)

[codecov]

Codecov Report

Merging #4510 (475dd77) into main (a87d8fd) will not change coverage.
The diff coverage is 100.0%.

@@          Coverage Diff          @@
##            main   #4510   +/-   ##
=====================================
  Coverage   81.3%   81.3%           
=====================================
  Files        220     220           
  Lines      17678   17678           
=====================================
  Hits       14386   14386           
  Misses      2992    2992           
  Partials     300     300           

Files Changed	Coverage
exporters/otlp/otlpmetric/version.go	100.0%
exporters/otlp/otlptrace/version.go	100.0%
sdk/metric/version.go	100.0%
sdk/version.go	100.0%
version.go	100.0%