chore: prepare next release

[otelbot-js]

Stable SDK (./CHANGELOG.md)

2.7.0

🚀 Features

• feat(sdk-logs): implement log creation metrics #6433 @anuraaga
• feat(sdk-metrics): add the cardinalitySelector argument to PeriodicExportingMetricReaders
  #6460 @starzlocker
• feat(opentelemetry-core): add extra checks on internal merge function for safety #6587 @maryliag

🐛 Bug Fixes

• fix(opentelemetry-resources): do not discard OTEL_RESOURCE_ATTRIBUTES when it contains empty kv pairs

🏠 Internal

• test(exporter-zipkin): fix broken browser test assertions and add missing coverage #6566 @overbalance
• fix(sdk-metrics): repair ExponentialHistogram tests #6565 @overbalance

Experimental (./experimental/CHANGELOG.md)

0.215.0

💥 Breaking Changes

• feat(sdk-logs)!: add required forceFlush() to LogRecordExporter interface #6356 @pichlermarc
  • (user-facing): LogRecordExporter interface now requires a forceFlush() method to be implemented. Custom exporters will need to implement this method to continue working with the Logs SDK.
• feat(api-logs, sdk-logs)!: add Logger#enabled() #6371 @david-luna

🚀 Features

• feat(otlp-transformer): add custom protobuf logs serializer #6228 @pichlermarc
• feat(otlp-transformer): add custom protobuf logs export response deserializer #6530 @pichlermarc

🐛 Bug Fixes

• fix(instrumentation-fetch): preserve init overrides when input is a Request object #6421 @akandic47
• fix(otlp-exporter-base): limit Node.js HTTP transport response body to 4 MiB #6552 @kartikgola
• fix(instrumentation-fetch): avoid unwrapping fetch API when disabling #6575 @david-luna
• fix(web-common): add check for possible unsafe json parse #6589 @maryliag
• fix(otlp-transformer): add check for possible unsafe json parse #6588 @maryliag

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 95.72%. Comparing base (6bc69c7) to head (42ec5be).
⚠️ Report is 1 commits behind head on main.

Additional details and impacted files

@@           Coverage Diff           @@
##             main    #6603   +/-   ##
=======================================
  Coverage   95.72%   95.72%           
=======================================
  Files         375      375           
  Lines       12769    12769           
  Branches     3028     3028           
=======================================
  Hits        12223    12223           
  Misses        546      546           

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[pichlermarc]

Looks like some changelogs are not aligned properly, opened #6604 to fix that.