[add]: Loan table extention

app/models/loan.py

@@ -25,6 +25,9 @@ class Loan(db.Model):
     initial_loan_amount = db.Column(db.Float, nullable=False) 
     default_penalty_fee = db.Column(db.Float, default=0)  
     continuous_fee = db.Column(db.Float, default=0)
+    upfront_fee = db.Column(db.Float, nullable=True, default=0.0)
+    repayment_amount = db.Column(db.Float, nullable=True, default=0.0)
+    installment_amount = db.Column(db.Float, nullable=True, default=0.0)
     status = db.Column(db.String(20), default='pending')
     due_date = db.Column(db.DateTime, nullable=True) 
     created_at = db.Column(db.DateTime, default=datetime.now(timezone.utc))
@@ -45,8 +48,20 @@ class Loan(db.Model):
     )
 
     @classmethod
-    def create_loan(cls, customer_id, account_id, offer_id, product_id, initial_loan_amount, collection_type, transaction_id, status='pending'):
-
+    def create_loan(
+        cls,
+        customer_id,
+        account_id,
+        offer_id,
+        product_id,
+        initial_loan_amount,
+        collection_type,
+        transaction_id,
+        upfront_fee,
+        repayment_amount,
+        installment_amount,
+        status="pending",
+    ):
         # Check if customer exists
         customer = Customer.is_valid_customer(customer_id)
         if not customer:
@@ -64,6 +79,9 @@ class Loan(db.Model):
             transaction_id = transaction_id,
             initial_loan_amount = initial_loan_amount,
             current_loan_amount = initial_loan_amount,
+            upfront_fee = upfront_fee,
+            repayment_amount = repayment_amount,
+            installment_amount = installment_amount,
             due_date=now, 
             status = status
         )