Change grader function to 'models.grader'

Updated grader function references from 'models.deterministic_grader' to 'models.grader' for all tasks.

openenv.yaml

@@ -38,26 +38,26 @@ schema:
 graders:
   deterministic_grader:
     description: "Evaluates agent performance based on task completion, deadline adherence, and energy efficiency"
-    fn: "models.deterministic_grader"
+    fn: "models.grader"
 tasks:
   - id: easy
     difficulty: easy
     description: "2 easy tasks with no deadlines. Agent must complete both tasks without burning out."
     max_steps: 50
     grader:
-      fn: "models.deterministic_grader"
+      fn: "models.grader"
       description: "Evaluates agent performance based on task completion, deadline adherence, and energy efficiency"
   - id: medium
     difficulty: medium
     description: "5 medium tasks with deadlines. Agent must balance speed and energy to meet deadlines."
     max_steps: 50
     grader:
-      fn: "models.deterministic_grader"
+      fn: "models.grader"
       description: "Evaluates agent performance based on task completion, deadline adherence, and energy efficiency"
   - id: hard
     difficulty: hard
     description: "8 hard tasks with tight deadlines and hidden fatigue mechanics. Agent must manage stress and interruptions."
     max_steps: 50
     grader:
-      fn: "models.deterministic_grader"
+      fn: "models.grader"
       description: "Evaluates agent performance based on task completion, deadline adherence, and energy efficiency"