[add]: accountId on loan and repayment

app/models/transaction.py

@@ -13,6 +13,7 @@ class Transaction(db.Model):
     )
     transaction_id = db.Column(db.String(50), nullable=False)
     account_id = db.Column(db.String(50), nullable=True)
+    customer_id = db.Column(db.String(50), nullable=True)
     type = db.Column(db.String(50), nullable=False)
     channel = db.Column(db.String(50), nullable=False)
     created_at = db.Column(db.DateTime, default=datetime.now(timezone.utc))
@@ -22,7 +23,7 @@ class Transaction(db.Model):
         return f'<Transaction {self.id}>'
 
     @classmethod
-    def create_transaction(cls, transaction_id, account_id, type, channel):
+    def create_transaction(cls, transaction_id, account_id, customer_id, type, channel):
 
         # if cls.query.filter_by(transaction_id=transaction_id).first():
         #     raise ValueError("Duplicate Transaction")
@@ -34,6 +35,7 @@ class Transaction(db.Model):
 
         transaction = cls(
             transaction_id = transaction_id,
+            customer_id = customer_id,
             account_id = account_id,
             type = type,
             channel = channel