feat: harden demo flows and observability

apps/mcp-server/src/catalog.rs

@@ -6,6 +6,7 @@ use std::{
 
 use mcpaas_registry::{PostgresRegistry, RegistryError, RegistryOperation};
 use tokio::sync::RwLock;
+use tracing::info;
 
 #[derive(Clone)]
 pub struct PublishedToolCatalog {
@@ -66,11 +67,18 @@ impl PublishedToolCatalog {
             .map(|operation| (operation.name.clone(), operation))
             .collect::<HashMap<_, _>>();
         let mut guard = self.cached.write().await;
+        let previous_count = guard.tools.len();
 
         guard.loaded_at = Some(Instant::now());
         guard.tools = tools;
         guard.tools_by_name = tools_by_name;
 
+        info!(
+            published_tool_count = guard.tools.len(),
+            previous_published_tool_count = previous_count,
+            "published tool catalog refreshed"
+        );
+
         Ok(())
     }
 }