refactor: Add SERVER prefix to debug log message in server mode

src/modes/server.rs

@@ -43,7 +43,7 @@ async fn run_server(
     conn: rusqlite::Connection,
     data_dir: PathBuf,
 ) -> Result<()> {
-    debug!("Starting REST HTTP server on {}", config.address);
+    debug!("SERVER: Starting REST HTTP server on {}", config.address);
     
     // Use the existing database connection
     let db_conn = Arc::new(Mutex::new(conn));