scheduling: fix atomicity issues

Author: Centril

crates/core/src/host/module_host.rs

@@ -1434,13 +1434,14 @@ impl ModuleHost {
     pub async fn call_reducer_with_params(
         &self,
         reducer_name: &str,
+        tx: Option<MutTxId>,
         params: CallReducerParams,
     ) -> Result<ReducerCallResult, NoSuchModule> {
         self.call(
             reducer_name,
-            params,
-            |p, inst| inst.call_reducer(None, p),
-            |p, inst| inst.call_reducer(None, p),
+            (tx, params),
+            |(tx, p), inst| inst.call_reducer(tx, p),
+            |(tx, p), inst| inst.call_reducer(tx, p),
         )
         .await
     }
@@ -1472,7 +1473,7 @@ impl ModuleHost {
         };
 
         Ok(self
-            .call_reducer_with_params(&reducer_def.name, call_reducer_params)
+            .call_reducer_with_params(&reducer_def.name, None, call_reducer_params)
             .await?)
     }