feat: more error logging

Signed-off-by: kjuulh <contact@kjuulh.io>

crates/churn/src/agent/grpc_client.rs

@@ -67,13 +67,16 @@ impl GrpcClient {
                 namespace: namespace.into(),
                 id: id.map(|i| i.into()),
             })
-            .await?;
+            .await
+            .inspect_err(|e| tracing::warn!("failed to establish a connection: {}", e))?;
 
         tracing::debug!("setup stream: {}", namespace);
         let mut inner = resp.into_inner();
         while let Ok(Some(message)) = inner.message().await {
             tracing::debug!("received message: {}", namespace);
-            exec.execute(message).await?;
+            exec.execute(message)
+                .await
+                .inspect_err(|e| tracing::warn!("failed to handle message: {}", e))?;
         }
 
         Ok(())