DEV-131521: Add account_identity and account_balance support to PaymentDetails

[diogoyaguas]

📌 Related Issues: DEV-131521

✅ Type of Change

• 🚀 Feature
• 🐛 Bugfix
• 🔨 Refactor
• 🧪 Tests
• 🧹 Chore / Maintenance
• 📄 Documentation

📝 Problem Statement

PaymentDetails lacked support for account_identity and account_balance objects, needed to pass account holder identity information and real-time balance data (via providers like Plaid, MX, etc.) on bank transfer/ACH orders.

📝 Solution Overview

Added two new optional fields to PaymentDetails:

• account_identity — holds names, addresses, phone numbers and emails associated with the payment account
• account_balance — holds available balance, service provider, timestamp and currency code

New files:

• AccountIdentity.php — model with 4 optional fields (names, addresses, phone_numbers, emails)
• AccountBalance.php — model with 4 required fields (available_balance, service_name, updated_at, currency_code); service_name validated via regex against supported providers (plaid, mx, stripe, truelayer, klarna, visa, mastercard, yodlee)

Modified:

• PaymentDetails.php — added account_identity and account_balance optional fields