Cap NFE at 128 for ZeroGPU call duration

engine.py

@@ -102,7 +102,7 @@ TASKS = {
         "checkpoint": "math500/elf_l_repa_reg/checkpoint_55824",
         "sccfg": 2.0,
         "default_nfe": 128,
-        "max_nfe": 256,
+        "max_nfe": 128,  # per-step decoder-logit analysis doubles the call time
         "paper": "13.39% pass@1 @ 128 NFE (paper Table 2)",
         "prompt": "Question: {q}\nStep-by-Step Answer:",
         "placeholder": "If $3x + 2(1 + x) = 17$, what is the value of $6x + 5$?",
@@ -112,7 +112,7 @@ TASKS = {
         "checkpoint": "code/elf_l_repa_reg/checkpoint_64248",
         "sccfg": 2.0,
         "default_nfe": 128,
-        "max_nfe": 256,
+        "max_nfe": 128,  # per-step decoder-logit analysis doubles the call time
         "paper": "22.56% HumanEval / 28.92% MBPP-378 pass@1 @ 128 NFE (paper Table 1)",
         "prompt": "Write a complete Python solution. Return only code.\n\n{q}\n\nPython solution:",
         "placeholder": 'def get_positive(l: list):\n    """Return only positive numbers in the list.\n    >>> get_positive([-1, 2, -4, 5, 6])\n    [2, 5, 6]\n    """',