fix: cover api edge cases

tests/telemetry.rs

@@ -1,4 +1,4 @@
-use pokedex_api::telemetry::Telemetry;
+use pokedex_api::telemetry::{Telemetry, UpstreamRequestOutcome};
 use std::time::Duration;
 
 #[test]
@@ -7,7 +7,12 @@ fn records_http_and_upstream_metrics_in_prometheus_text_format() {
     let metrics = telemetry.metrics();
 
     metrics.record_http_request("GET", "/pokemon/{name}", 200, Duration::from_millis(10));
-    metrics.record_upstream_request("pokeapi", "pokemon_species", true, Duration::from_millis(5));
+    metrics.record_upstream_request(
+        "pokeapi",
+        "pokemon_species",
+        UpstreamRequestOutcome::Success,
+        Duration::from_millis(5),
+    );
     let rendered = telemetry
         .render_prometheus()
         .expect("metrics should render as text");