Access to Raw Serialized Data (Raw Data) in Latest gRPC Version Without Marshaling - Previous Workaround No Longer Available

[mohdjishin]

In prior gRPC versions, the stats handler provided direct access to raw serialized data through payload.Data in *stats.InPayload. This functionality enabled certain applications to retrieve unmodified byte data directly. While a workaround was previously available — leveraging TagRPC to add values to the context and HandleRPC to access raw bytes for *stats.InPayload — this approach is no longer possible in the latest version.

Issue: With this removal, it is challenging to obtain raw request bytes directly without additional marshaling. The previous workaround, as discussed in @dfawley comment on May 17, 2023 Workaround, no longer works in the latest gRPC version.

The removal of payload.Data occurred in this commit