eliminated some hardcoded values

app/utils/extras.py

@@ -0,0 +1,16 @@
+def preprocess_loan_charges_data(data):
+    """
+       Preprocesses the data into a dictionary for efficient lookups by 'code'.
+
+       Args:
+           data: A list of dictionaries.
+
+       Returns:
+           A dictionary where keys are 'code' values and values are the corresponding dictionaries from the input data.
+           If multiple items have the same code, the last one encountered will be stored.
+    """
+    preprocessed = {}
+    for item in data:
+        if 'code' in item:
+            preprocessed[item['code']] = item
+    return preprocessed