[bug] Baggage is not propagated across spans of a trace

[mu88]

Component

OpenTelemetry.Instrumentation.EntityFrameworkCore

Package Version

Package Name	Version
OpenTelemetry	1.4.0
OpenTelemetry.Extensions.Hosting	1.4.0
OpenTelemetry.Instrumentation.AspNetCore	1.0.0-rc9
OpenTelemetry.Instrumentation.EntityFrameworkCore	1.0.0-rc9
OpenTelemetry.Instrumentation.Runtime	1.0.0-rc9
OpenTelemetry.Instrumentation.Process	1.0.0-rc9
OpenTelemetry.Exporter.OpenTelemetryProtocol	1.4.0

Runtime Version

net9.0

Description

Baggage items set using Activity.SetBaggage or OpenTelemetry.Baggage.SetBaggage are not propagated across spans of a trace.

Steps to Reproduce

1. Clone the repository Repro_OpenTelemetry_Baggage.
2. Run docker compose up.
3. Call http://localhost:8080/seed to seed some data.
4. Call http://localhost:8080/blogs to trigger trace creation.
5. Open the trace of http://localhost:8080/blogs using the Aspire Dashboard http://localhost:18888/traces.

Expected Result

Both the baggage items custom_identifier_baggage_OTEL and custom_identifier_baggage_Activity should be present on the corresponding EF Core span.

Actual Result

The baggage items custom_identifier_baggage_OTEL and custom_identifier_baggage_Activity are missing on the corresponding EF Core span:

Additional Context

No response