v0.10.0

Stable-channel republication of 1.0.0-rc.2 — the first stable-channel
release since 0.9.1. The code is the rc's code with a stable version
stamp, so users who have not opted into prereleases get the fixes. See
the 1.0.0-beta.* through 1.0.0-rc.2 entries for the complete history
since 0.9.1.

Breaking (relative to 0.9.1)

• Everything the rc line changed applies here, most notably
  1.0.0-rc.1's removal of 116 vendor/RUM identifiers that were not
  OpenTelemetry semantic conventions. doc/SEMCONV_CANDIDATES.md maps
  every removal to its registry replacement, a staged candidate, or a
  recorded reason for dropping it.

Highlights

• OTelAPI.setErrorHandler — configure where the library's internal
  error reports go. The default logs and never throws; a strict handler
  can crash-fast in development; Context.runIsolate carries the
  handler into child isolates.
• Spec-compliance fixes: Span.end() no longer fabricates an Ok
  status, CompositePropagator.extract runs in registration order, and
  Context.withSpanContext derives instead of throwing.
• Semantic conventions at registry v1.44.0, including the complete
  browser.web_vital.* set, plus an @experimental candidates/
  staging area for keys proposed upstream.