Initial attempt at adding infile tracking

Author: Ryan Cali

pydra/engine/audit.py

@@ -177,13 +177,18 @@ def audit_task(self, task):
         else:
             # work on changing this to function name
             command = None
+        if hasattr(task.inputs, "in_file"):
+            inputs = task.inputs.in_file
+        else:
+            inputs = None
 
         start_message = {
             "@id": self.aid,
             "@type": "task",
             "label": label,
             "command": command,
             "startedAtTime": now(),
+            "Used": inputs
         }
         self.audit_message(start_message, AuditFlag.PROV)