Parent traceID not propogating to REST calls using otelgin.Middleware

[Connect2naga]

HI

Trying sample Application using Gin and otelgin.Middleware() to stich chain of REST API calls. Below is the scenario tried. (which is mentioned in https://signoz.io/blog/opentelemetry-gin/)

1. Make rest call to Books Application
2. Books applications make call to Stores Applications to get all books from All stores
3. Store applications just return empty.

Actually Books API call and Store Api calls' should be linked. But it not happening and both calls having different TraceID.

Note : Same tried with Mux it is working. Signoz used for view traces

Screenshots:
Books Application:

Store Application:

Example code available in https://github.com/Connect2naga/Examples/tree/main/Standalone

Please correct me if any thing missed or need to change the configuration.