refactor: update Python version and optimize dice configuration parameters

tests/utils/test_potential.py

@@ -1,36 +1,35 @@
-from pathlib import Path
-from typing import Any
-
-import pytest
-
 from diceplayer.config import PlayerConfig
 from diceplayer.environment import System
 from diceplayer.utils.potential import read_system_from_phb
 
+import pytest
+
 
 class TestPotential:
     @pytest.fixture
     def player_config(self) -> PlayerConfig:
-        return PlayerConfig.model_validate({
-            "type": "both",
-            "mem": 12,
-            "max_cyc": 100,
-            "switch_cyc": 50,
-            "ncores": 4,
-            "dice": {
-                "nprocs": 4,
-                "ljname": "phb.ljc.example",
-                "outname": "test",
-                "dens": 1.0,
-                "nmol": [12, 16],
-                "nstep": [1, 1],
-            },
-            "gaussian": {
-                "level": "test",
-                "qmprog": "g16",
-                "keywords": "test",
-            },
-        })
+        return PlayerConfig.model_validate(
+            {
+                "type": "both",
+                "mem": 12,
+                "max_cyc": 100,
+                "switch_cyc": 50,
+                "ncores": 4,
+                "dice": {
+                    "nprocs": 4,
+                    "ljname": "phb.ljc.example",
+                    "outname": "test",
+                    "dens": 1.0,
+                    "nmol": [12, 16],
+                    "nstep": [1, 1],
+                },
+                "gaussian": {
+                    "level": "test",
+                    "qmprog": "g16",
+                    "keywords": "test",
+                },
+            }
+        )
 
     def test_read_phb(self, player_config: PlayerConfig):
         system = read_system_from_phb(player_config)