OpenTelemetry Baggage Span Processor

The `opentelemetry-processor-baggage` library provides a `BaggageSpanProcessor` for OpenTelemetry Python, which automatically reads entries stored in Baggage from the parent context and adds their keys and values to the span as attributes upon span start. This enables propagating business context across services. It is part of the `opentelemetry-python-contrib` repository, which has an active release cadence, often with pre-release (`0.x.y.b0`) versions. The current version is 0.62b0.