Enable libcnb tracing (#320)

This enables `libcnb`'s `trace` feature, which means traces, spans, and events are written to OpenTelemetry export files on disk in the ephemeral build container, which can then be read by the Heroku build system or when debugging locally with Pack (so long as a suitable `--volume` mount has been configured). See: heroku/libcnb.rs#723 GUS-W-15148605.
heroku · Jan 23, 2025 · 1bb68e5 · 1bb68e5
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diff --git a/CHANGELOG.md b/CHANGELOG.md
@@ -7,6 +7,10 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 
 ## [Unreleased]
 
+### Added
+
+- Enabled `libcnb`'s `trace` feature. ([#320](https://github.com/heroku/buildpacks-python/pull/320))
+
 ## [0.23.0] - 2025-01-13
 
 ### Changed