fix(deps): update rust crate opentelemetry to 0.32

[renovate]

This PR contains the following updates:

Package	Type	Update	Change
opentelemetry (source)	dependencies	minor	0.31 → 0.32

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Release Notes

open-telemetry/opentelemetry-rust (opentelemetry)

v0.32.0

Compare Source

Released 2026-May-08

• Added BoundCounter<T> and BoundHistogram<T> types that cache resolved
  aggregator references for a fixed attribute set. Created via Counter::bind()
  and Histogram::bind(), bound instruments bypass per-call attribute lookup,
  providing significant performance improvements for hot paths where the same
  attributes are used repeatedly. Both types implement Clone so a single bound
  state can be shared across threads or modules without re-binding. Also adds
  the SyncInstrument::bind() trait method and BoundSyncInstrument<T> trait
  for SDK implementors; the trait method has a no-op default so custom
  SyncInstrument impls degrade gracefully without panicking. Gated behind the
  experimental_metrics_bound_instruments feature flag.
• Add reserve method to opentelemetry::propagation::Injector to hint at the number of elements that will be added to avoid multiple resize operations of the underlying data structure. Has an empty default implementation.
• Breaking Removed the following public fields and methods from the SpanBuilder #​3227:
  • trace_id, span_id, end_time, status, sampling_result
  • with_trace_id, with_span_id, with_end_time, with_status, with_sampling_result
• Added #[must_use] attribute to opentelemetry::metrics::AsyncInstrumentBuilder to add compile time warning when .build() is not called on observable instrument builders, preventing silent failures where callbacks are never registered and metrics are never reported.
• Breaking Moved the following SDK sampling types from opentelemetry::trace to opentelemetry_sdk::trace #​3277:
  • SamplingDecision, SamplingResult
  • These types are SDK implementation details and should be imported from opentelemetry_sdk::trace instead.
• "spec_unstable_logs_enabled" feature flag is removed. The capability (and the
  backing specification) is now stable and is enabled by default.
  3278
• Remove the empty "message" field from tracing events emitted via the internal-logs feature
• Fix panic when calling Context::current() from Drop implementations triggered by ContextGuard cleanup (#​3262).

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