feat: introduce Maestro::initialize function that creates the maestro instance and ensure_ready the topology as well. Also refactor all relevant examples to use this new initialize function

examples/nanodc/src/main.rs

@@ -9,7 +9,7 @@ use harmony::{
 async fn main() {
     let inventory = Inventory::autoload();
     let topology = HAClusterTopology::autoload();
-    let mut maestro = Maestro::new(inventory, topology);
+    let mut maestro = Maestro::initialize(inventory, topology).await.unwrap();
 
     maestro.register_all(vec![
         // ADD scores :