Update geth dependency (#62)

update geth dep

feat: add X-BuilderNet-SentAtUs header handling (#60)

Adds the option to extract the `X-BuilderNet-SentAtUs` header to the Go
proxy. Allows 2 connected proxies to establish some latency stats on
exchanged messages, which is useful in benchmarking.

(fix:) returned error name (#54)

After refactoring of relay-api error namings improved, thus we need to
change value here in tests

Update rpcserver to goccy/go-json (#51)

JSON en/decoding can be bottlenecking.

Switching to https://github.com/goccy/go-json is worth a shot

set request size in request context (#48)

enrich rpc related metrics with bool size classifier (#47)

eth_sendBundle update with refundIdentity (#46)

- New field for eth_sendBundle
- Improved comments

fix tls key permissions (#45)

added GetOrGenerateTLS (#44)

This pull request introduces a new utility function, `GetOrGenerateTLS`,
in the `tls/tls_generate.go` file. The function simplifies handling TLS
certificates by attempting to load them from specified paths or
generating and saving new ones if they do not exist.

### TLS Certificate Management:
* Added the `GetOrGenerateTLS` function to load TLS certificates and
keys from specified paths, or generate and save new self-signed
certificates and keys if the files are missing. This includes error
handling for file operations and certificate generation.
(`tls/tls_generate.go`,
[tls/tls_generate.goR14-R54](diffhunk://#diff-dcccc347b7f85fe0c7ad6329e730d69c035152c1993c176b6a8680c1c208949bR14-R54))