Adding State Transition Error Logging. (#2425)

* Adding State Transition Logging.

* Fix log call.

* Removing logging statement.

* Fix error! call.

* Adding error to error message.

* Make err var borrowed.

* Formatting.

src/agent/onefuzz-task/src/tasks/generic/input_poller.rs

@@ -248,9 +248,13 @@ impl<M> InputPoller<M> {
 
         let result = self.try_trigger(state, event).await;
 
-        if result.is_err() {
+        if let Err(err) = &result {
             // We must maintain a valid state, and we can logically recover from
             // any failed action or invalid transition.
+            error!(
+                "State Transition Failed. Resetting state to 'Ready.' Error: {}",
+                err
+            );
             self.state = Some(State::Ready);
         }