fix(observability): preserve inbound trace context

apps/admin-api/src/request_context.rs

@@ -6,7 +6,7 @@ use axum::{
 };
 use crank_core::{CorrelationContext, RequestId, TraceContext};
 use crank_metrics::ExemplarTraceId;
-use crank_observability::{set_remote_trace_parent, with_request_correlation};
+use crank_observability::with_request_correlation;
 use tracing::{Instrument, info, info_span};
 
 pub const REQUEST_ID_HEADER: HeaderName = HeaderName::from_static("x-request-id");
@@ -124,11 +124,7 @@ fn one_auxiliary_header_within_budget(
 }
 
 fn set_canonical_parent(span: &tracing::Span, context: &TraceContext) {
-    let mut headers = axum::http::HeaderMap::new();
-    if let Ok(value) = HeaderValue::from_str(context.traceparent()) {
-        headers.insert("traceparent", value);
-        set_remote_trace_parent(span, &headers);
-    }
+    crank_trace::set_parent_from_trace_context(span, context);
 }
 
 #[cfg(test)]