chore(clippy): fix

viz-handlers/Cargo.toml

@@ -30,11 +30,13 @@ embed = ["dep:hex", "dep:mime_guess", "dep:http-body-util", "dep:rust-embed"]
 
 prometheus = [
   "dep:http-body-util",
-  "opentelemetry/internal-logs",
   "dep:opentelemetry-prometheus",
-  "dep:prometheus"
+  "dep:prometheus",
+  "internal-logs"
 ]
 
+internal-logs = ["tracing", "opentelemetry/internal-logs"]
+
 [dependencies]
 viz-core.workspace = true
 
@@ -60,6 +62,7 @@ rust-embed = { workspace = true, optional = true }
 opentelemetry = { workspace = true, default-features = false, optional = true }
 opentelemetry-prometheus = { workspace = true, optional = true }
 prometheus = { workspace = true, optional = true }
+tracing = { workspace = true, optional = true }
 
 [dev-dependencies]
 tokio = { workspace = true, features = ["rt", "macros"] }

viz-handlers/src/prometheus.rs

@@ -3,7 +3,6 @@
 //! [OTEL]: https://docs.rs/opentelemetry-prometheus
 
 use http_body_util::Full;
-use opentelemetry::otel_error;
 use prometheus::{Encoder, TextEncoder};
 
 use viz_core::{
@@ -42,7 +41,10 @@ impl Handler<Request> for Prometheus {
         if let Err(err) = encoder.encode(&metric_families, &mut body) {
             let error = StatusCode::INTERNAL_SERVER_ERROR;
             let text = err.to_string();
-            otel_error!(name: "prometheus_encode_failure", error_code = error.as_u16(), error = text.clone());
+
+            #[cfg(feature = "internal-logs")]
+            opentelemetry::otel_error!(name: "prometheus_encode_failure", error_code = error.as_u16(), error = text.clone());
+
             Err((error, text).into_error())?;
         }