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Clarify that tokio runtime metrics are recorded through the OpenTelemetry global meter and document the no-op behavior when no meter provider is installed. Also make OTLP endpoint suffix detection stricter to avoid false matches on unrelated paths, update the 0.1.0 changelog date, and slightly reduce log-control test port allocation races before the initial release.
Tokio 1.52 already provides the runtime metrics used by this crate on stable, so requiring consumers and CI to compile with --cfg tokio_unstable was unnecessary. Remove the outdated prerequisite from crate docs, README, and CI while keeping the real requirement documented: tokio-metrics still needs an installed OpenTelemetry meter provider to emit anything.
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What changed
Documentation (README.md, src/lib.rs)
current-thread drop behavior
Code (src/tokio_metrics.rs)
requires the flag
CI (.github/workflows/ci.yml)