Protobuf build error

[yuvadm]

Receiving the following error when building latest on Ubuntu 22.04 -

error: failed to run custom build command for `nostr-rs-relay v0.8.4 (/home/ubuntu/nostr-rs-relay)`

Caused by:
  process didn't exit successfully: `/home/ubuntu/nostr-rs-relay/target/debug/build/nostr-rs-relay-5addfc5e2f7e03c4/build-script-build` (exit status: 1)
  --- stdout
  cargo:rerun-if-changed=proto/nauthz.proto
  cargo:rerun-if-changed=proto

  --- stderr
  Error: Custom { kind: Other, error: "protoc failed: nauthz.proto: This file contains proto3 optional fields, but --experimental_allow_proto3_optional was not set.\n" }
warning: build failed, waiting for other jobs to finish...

[scsibug]

Unfortunately with how things are setup right now, you need a fairly recent version of protobuf-compiler. I need to check if removing the optional annotations breaks anything, that may let us use older versions.