swarm-queue-client: add an authenticated HttpClient for OTLP exporters (otel-auth feature)

swarm-queue-client/src/lib.rs

@@ -164,6 +164,14 @@ pub fn chain(error: &dyn std::error::Error) -> String {
 /// which is the disagreement this module exists to prevent.
 pub mod status;
 
+/// An [`opentelemetry_http::HttpClient`] impl that authenticates every
+/// request with a fresh token from this crate's identity — see the
+/// module's own doc for the full rationale. Behind the `otel-auth`
+/// feature, same reasoning as `status`/`kv` above: only a caller wiring an
+/// OTLP exporter to this identity needs the extra dependencies it pulls in.
+#[cfg(feature = "otel-auth")]
+pub mod otel_http_client;
+
 /// The subject the swarm controller publishes on when the hive-wide knowledge
 /// repository has changed. One writer, many readers — every hive subscribes.
 ///