Is the Murabaha transaction that takes place between Dar As-Safaa and the client, which includes a profit margin in exchange for services and file costs, considered a sound Islamic transaction, or is it a form of circumvention, especially if the total amount paid to the bank far exceeds the price of the house?

The mentioned financing is a permissible Murabaha contract if it is implemented in practice. A condition for its permissibility is that the stipulated insurance must be cooperative insurance. As for the total price exceeding the house's price, there is no objection to it by mutual consent, as both reason and Sharia (definition) acknowledge the difference between a spot price and a deferred price.