Add protobuf support for onlyspans ingestion

[sl0thentr0py]

• use official prost and serde compatible structs from opentelemetry-proto
• use axum-extra with the protobuf feature for the protobuf extractor
• removed our old custom structs and replaced the transformation logic

TODO

• trace_id/span_id are Vec<u8>, fix that conversion
• the date conversion helper from strings is not added to their serde derives, so I've ignored this test for now will need to do upstream later

[iker-barriocanal]

Overall looks good to me, leaving the final review to @jjbayer as I don't have enough context to provide proper feedback.

[Dav1dde]

We definitely have to make sure to not have an unpinned git dependency. Also would like to get a review from @jjbayer, I am missing context and was just looking for Rust stuff.

[jjbayer]

@sl0thentr0py thanks for doing this! Nice to see some LoCs removed. Please add a test for binary protobuf ingestion to test_store.py. See

relay/tests/integration/test_store.py

Line 1412 in 1f9b731

def test_span_ingestion(

[Dav1dde]

Thanks looks good to me! Left a small improvement to the handle function.

It would also be nice to have at least one integration test which makes sure we're parsing the data correctly.

the date conversion helper from strings is not added to their serde derives, so I've ignored this test for now

To you still want to address this todo from your PR description?

[sl0thentr0py]

added integration test
the date stuff will need to be done upstream later, I think it's fine to remove that functionality for now since we're relying on official otel structs anyway and if it's in the spec they will eventually add it.

[Dav1dde]

👍