fix(dynamodb): INSERT events not processed when multiple tables are p…

…resent

There seems to be a bug where INSERT events aren't processed by the stream consumer (only for apps that have more than one table).

The workaround stops reusing the same host (and container) and instead creates one container per table.

dynamodb/dynamodb.sim.w

@@ -50,7 +50,12 @@ pub class Table_sim impl dynamodb_types.ITable {
   pub connection: dynamodb_types.Connection;
 
   new(props: dynamodb_types.TableProps) {
-    this.host = Host.of(this);
+    // Ideally, we would reuse the same host (and container) for all tables in the same stack,
+    // but there seems to be a bug somewhere that prevents INSERT events from being processed
+    // where there's more than one table in the application.
+    //
+    // So, instead of `this.host = Host.of(this);`, we just:
+    this.host = new Host();
 
     let tableName = props.name ?? this.node.addr;
     let state = new sim.State();