refactor var names

src/models.py

@@ -17,16 +17,16 @@ class DarcKey(BaseModel):
     @classmethod
     def _random_shuffle(cls, array: list[int]) -> list[int]:
         for i in range(len(array) - 1, 0, -1):
-            j = cls._random_number(0, i)
+            j = cls._random_number_in_range(0, i)
             array[i], array[j] = array[j], array[i]
         return array
 
     @classmethod
     def _random_mask(cls, array_len: int, max_val: int) -> list[int]:
-        return [cls._random_number(0, max_val) for _ in range(array_len)]
+        return [cls._random_number_in_range(0, max_val) for _ in range(array_len)]
 
     @staticmethod
-    def _random_number(min_val: int, max_val: int) -> int:
+    def _random_number_in_range(min_val: int, max_val: int) -> int:
         """ originally secure_rand """
         return min_val + secrets.randbelow(max_val - min_val + 1)