feat(telemetry): take every telemetry name from the protocol registry

.changeset/protocol-semconv.md

@@ -0,0 +1,5 @@
+---
+livekit-protocol: patch
+---
+
+Add `semconv`, the telemetry names and enum values generated from the protocol's Weaver registry, and move the protocol submodule to `003613b7`.

.changeset/telemetry-semconv.md

@@ -0,0 +1,5 @@
+---
+livekit-telemetry: minor
+---
+
+Take every telemetry name from the protocol registry (`livekit_protocol::semconv`) and send its spelling: `lk.room_sid`, `lk.participant_id`, `lk.track_sid`, `lk.pii.room_name`, `lk.pii.participant_identity`, `lk.pii.remote_participant_identity`, `lk.track_source` with the RTC FFI `TrackSource` names, and `lk.disconnect_reason` with the protobuf `DisconnectReason` names.

.github/workflows/license-check.yml

@@ -41,5 +41,6 @@ jobs:
             -ignore "livekit-protocol/src/livekit.agent.serde.rs" \
             -ignore "livekit-protocol/src/logger.rs" \
             -ignore "livekit-protocol/src/logger.serde.rs" \
+            -ignore "livekit-protocol/src/semconv.rs" \
             -ignore "livekit-api/src/public_api/generated.rs" \
              **/*.{rs,cpp,c}

livekit-protocol/generate_proto.sh

@@ -17,8 +17,12 @@
 
 
 PROTOCOL=${PROTOCOL:-protocol/protobufs}
+SEMCONV=${SEMCONV:-protocol/otel/gen/rust/semconv.rs}
 OUT_RUST=src
 
+# The telemetry names: generated in the protocol repository by Weaver (`otel/generate.sh`).
+cp "$SEMCONV" $OUT_RUST/semconv.rs
+
 protoc \
     -I=$PROTOCOL \
     --prost_out=$OUT_RUST \

livekit-protocol/src/lib.rs

@@ -49,3 +49,7 @@ pub mod agent {
 pub mod logger {
     include!("logger.rs");
 }
+
+// Generated by `generate_proto.sh` from `protocol/otel/gen/rust/semconv.rs`.
+#[rustfmt::skip]
+pub mod semconv;