Improve comments

Author: lym953

bottlecap/src/logs/flusher.rs

@@ -54,7 +54,7 @@ impl Flusher {
 
     pub async fn flush(&self, batches: Option<Arc<Vec<Vec<u8>>>>) -> Vec<reqwest::RequestBuilder> {
         let Some(api_key) = self.api_key_factory.get_api_key().await else {
-            error!("Skipping flush: Failed to resolve API key");
+            error!("Skipping flushing logs: Failed to resolve API key");
             return vec![];
         };
 

bottlecap/src/traces/trace_flusher.rs

@@ -58,7 +58,7 @@ impl TraceFlusher for ServerlessTraceFlusher {
 
     async fn flush(&self, failed_traces: Option<Vec<SendData>>) -> Option<Vec<SendData>> {
         let Some(api_key) = self.api_key_factory.get_api_key().await else {
-            error!("Skipping flush in trace flusher: Failed to resolve API key");
+            error!("Skipping flushing traces: Failed to resolve API key");
             return None;
         };
 
@@ -83,6 +83,7 @@ impl TraceFlusher for ServerlessTraceFlusher {
         while !trace_builders.is_empty() {
             let traces: Vec<_> = trace_builders
                 .into_iter()
+                // Lazily set the API key
                 .map(|builder| builder.with_api_key(&api_key))
                 .map(SendDataBuilder::build)
                 .collect();