Add serialized size to structs used in gRPC responses #1867
Description
Several endpoints check the number of updates included in the response to stay within MAX_RESPONSE_PAYLOAD_BYTES response size. It would be nice to have the serialized size constant associated with the response types to estimate each response size.
This probably requires changes in the protocol first.
Not for this PR, but it would be good to make this based on the actual serialization sizes. For example, we could have BlockHeader::SERIALIZED_SIZE constant and use it here.
Let's create an issue for this (and include NOTE_RECORD_BYTES in this issue too).
Proposed in: #1843 (comment)