feat(state_machine): add access to execution history using tracker

Author: willyrgf

mfm_machine/src/state_machine/mod.rs

@@ -4,7 +4,7 @@ use anyhow::anyhow;
 
 use crate::state::{context::ContextWrapper, StateResult, States};
 
-use self::tracker::{HashMapTracker, Index, Tracker};
+use self::tracker::{HashMapTracker, Index, Tracker, TrackerHistory};
 
 pub mod tracker;
 
@@ -56,6 +56,10 @@ impl StateMachine {
         }
     }
 
+    pub fn track_history(&self) -> TrackerHistory {
+        self.tracker.history()
+    }
+
     fn has_state(&self, state_index: usize) -> bool {
         self.states.len() > state_index
     }

mfm_machine/tests/retry_workflow_state_machine_test.rs

@@ -24,5 +24,10 @@ fn test_retry_workflow_state_machine() {
 
     let result = state_machine.execute(context);
 
+    println!(
+        "state machine execution history: \n{:?}",
+        state_machine.track_history()
+    );
+
     assert!(result.is_ok());
 }