chore: prepare next release

[otelbot-js]

Stable SDK (./CHANGELOG.md)

2.6.0

💥 Breaking Changes

• fix(resources): update OTEL_RESOURCE_ATTRIBUTES parsing to match spec changes (Refine the handling of OTEL_RESOURCE_ATTRIBUTES. opentelemetry-specification#4856) #6261 @JacksonWeber
  • Important: This fix is included in the "breaking changes" section because it can be breaking for some edge case usage of OTEL_RESOURCE_ATTRIBUTES:
    • export OTEL_RESOURCE_ATTRIBUTES=foo=bar,spam will now be fully ignored, because the spam entry is invalid (missing =). Per spec, any parsing error results in ignoring the entire environment variable.
    • export OTEL_RESOURCE_ATTRIBUTES='wat=" spaces "' will now result in {"wat": "\" spaces \""} with the double-quotes included in the value. Before this change the implementation included brittle double-quoting to allow leading and trailing whitespace in the value. To support leading or trailing whitespace now, you must percent-encode the whitespace. Internal whitespace still works without encoding, e.g. export OTEL_RESOURCE_ATTRIBUTES='green=eggs and ham'.

🚀 Features

• feat(sdk-trace): implement span start/end metrics #6213 @anuraaga

🐛 Bug Fixes

• fix(sdk-trace-web): propagate optimised flag in getElementXPath recursion #6335 @akkupratap323

Experimental (./experimental/CHANGELOG.md)

0.213.0

💥 Breaking Changes

• fix(api-logs)!: drop lingering includeTraceContext from LoggerOptions type #6451 @trentm

🚀 Features

• feat(instrumentation-http): provide http.request.header.<key> at server span creation time #6396 @vitorvasc

🐛 Bug Fixes

• fix(instrumentation-http): guard against double-instrumentation if loaded with require('http') and import 'http' #6428 @trentm
• fix(otlp-exporter-base): handle response error #6412 @pichlermarc
  • Fixes a bug where when the response header was received, but the connection was reset by the server,
    an unhandled error would be thrown.
• fix(otlp-exporter-base): remove sendBeacon in favor of fetch with keepalive #6391 @overbalance
  • (user-facing) createOtlpSendBeaconExportDelegate will be removed in a future version
• fix(otlp-transformer): downgrade protobufjs to version ^7.0.0 #6418 @vitorvasc
• fix(instrumentation-fetch): handle HeadersInit tuple arrays in _addHeaders #6341 @overbalance @imadha

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 95.70%. Comparing base (30f94fe) to head (3900c62).
⚠️ Report is 1 commits behind head on main.

Additional details and impacted files

@@           Coverage Diff           @@
##             main    #6464   +/-   ##
=======================================
  Coverage   95.70%   95.70%           
=======================================
  Files         364      364           
  Lines       11772    11772           
  Branches     2743     2743           
=======================================
  Hits        11266    11266           
  Misses        506      506           

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