fix bug where meta files where not auto-created upon starting + fix bug where meta json files were actually binary + improved access control to database instances

src/main.rs

@@ -76,9 +76,12 @@ async fn main() {
     // new server
     let mut server = server::Server::new(option).await;
 
-    // Initialize the default database storage
+    // Initialize the default database storage (creates 0.db)
     let _ = server.current_storage();
 
+    // Ensure default meta for DB 0 exists (public by default if missing)
+    let _ = herodb::rpc::RpcServerImpl::load_meta_static(&server.option.dir, 0).await;
+
     // Add a small delay to ensure the port is ready
     tokio::time::sleep(std::time::Duration::from_millis(100)).await;