fix show rejection error

grasp-audit/src/client.rs

@@ -93,9 +93,11 @@ impl AuditClient {
         let output = self.client.send_event(&event).await?;
         let event_id = *output.id();
         
-        // Check if any relay rejected the event
-        if output.success.is_empty() && !output.failed.is_empty() {
-            return Err(anyhow!("All relays rejected the event"));
+        // Check if any relay rejected the event and return the error message
+        if !output.failed.is_empty() {
+            // Get the first failed relay error message
+            let (relay_url, error) = output.failed.iter().next().unwrap();
+            return Err(anyhow!("Relay {} rejected event: {}", relay_url, error));
         }
         
         // Wait a bit for event to propagate

grasp-audit/src/specs/grasp01/event_acceptance_policy.rs

@@ -480,8 +480,7 @@ impl EventAcceptancePolicyTests {
     ) -> Result<(), String> {
         let event_id = event.id;
         
-        client.send_event(event).await
-            .map_err(|e| e.to_string())?;
+        client.send_event(event).await?;
         
         tokio::time::sleep(Duration::from_millis(100)).await;