Refactor: Fix clippy warnings and introduce AppError

server/src/handlers/meta.rs

@@ -409,7 +409,7 @@ impl McpTool for OmniSearchHandler {
                 ));
             }
         };
-        println!("OMNI SEARCH MATCHES: {:?}", matches);
+        // tracing::info!("OMNI SEARCH MATCHES: {:?}", matches);
         let q = req.query.clone();
         let query_emb = crate::embedding::generate_embedding_async(q.clone()).await.unwrap_or_default();
 
@@ -846,7 +846,7 @@ mod tests {
             .execute(json!({"query": "Omni"}), state.clone())
             .await
             .unwrap();
-        println!("OMNI RES: {}", omni_res);
+        // tracing::info!("OMNI RES: {}", omni_res);
         assert!(
             omni_res.contains("omni-1"),
             "omni search should return results containing the task id"