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Add OTEL tracing spans for all server methods. Trace IDs are extracted from the client request for distributed tracing support.
Client injects tracing id which is propogated to the server.
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End-to-end distributed tracing over gRPC
gRPC clients inject trace identifiers into requests. Servers fetch these identifiers allowing us to trace requests and responses end-to-end.
Sampling rate configuration allows us to trace at configurable frequencies.