Add demand subtype, interest-type, and rate fields to Loan Demand and Loan Interest Accrual

Add demand subtype, interest-type, and rate fields to Loan Demand and Loan Interest Accrual: a task in bird-critic-1.5-full-300 (Harbor dataset). Frappe Lending is a loan management system built on the Frappe framework. The codebase is at /workspace/repo . Services and dependencies are…