Deduplicate reactive scope updates/Reset subscriptions on reruns/fix use memo double update (#2506)

* deduplicate effect updates

* only subscribe to signals read in the current run of reactive scopes

* subscribe to memo reads after recomputing the value

Cargo.lock

@@ -2323,6 +2323,7 @@ dependencies = [
  "quote",
  "rustversion",
  "syn 2.0.60",
+ "tokio",
  "trybuild",
 ]