fix: deepsource

Author: parmesant

src/telemetry.rs

@@ -25,6 +25,9 @@ use opentelemetry_sdk::{
     trace::{BatchSpanProcessor, SdkTracerProvider},
 };
 
+const EXPORTER_OTLP_ENDPOINT: &str = "OTEL_EXPORTER_OTLP_ENDPOINT";
+const EXPORTER_OTLP_PROTOCOL: &str = "OTEL_EXPORTER_OTLP_PROTOCOL";
+
 /// Initialise an OTLP tracer provider.
 ///
 /// **Required env var:**
@@ -48,10 +51,10 @@ use opentelemetry_sdk::{
 pub fn init_otel_tracer() -> Option<SdkTracerProvider> {
     // Only used to decide whether OTEL is enabled; the SDK reads it again
     // from env to build the exporter (which also appends /v1/traces for HTTP).
-    std::env::var("OTEL_EXPORTER_OTLP_ENDPOINT").ok()?;
+    std::env::var(EXPORTER_OTLP_ENDPOINT).ok()?;
 
     let protocol =
-        std::env::var("OTEL_EXPORTER_OTLP_PROTOCOL").unwrap_or_else(|_| "http/json".to_string());
+        std::env::var(EXPORTER_OTLP_PROTOCOL).unwrap_or_else(|_| "http/json".to_string());
 
     // Build the exporter using the SDK's env-var-aware builders.
     // We intentionally do NOT call .with_endpoint() / .with_headers() /