rumenov opened a new pull request, #9933:
URL: https://github.com/apache/arrow-rs/pull/9933

   Allow FlightServiceClient to be parameterized over the underlying channel 
type, so  
     users can wrap a tonic channel with custom interceptors or services.
                                                                                
        
   Motivation: Annotating outbound Flight requests with metadata (e.g. 
injecting      
     OpenTelemetry trace context into headers) currently requires forking or 
wrapping at
     a higher level. Making the channel generic lets callers compose tower      
        
     layers/interceptors idiomatically and propagate distributed tracing 
context without
     bespoke plumbing.


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