Is it permissible to purchase bonds or insure the mosque to protect it from the contractor's cessation of work or from damages after its completion?

Purchasing common bonds and insurance contracts is forbidden. Therefore, one must seek Allah's help and rely upon Him, choose a trustworthy contractor, and meticulously write the contract terms. Perhaps the system and courts will deliver justice if something undesirable occurs. And remember the words of Allah Almighty: "A mosque founded on righteousness from the first day is more worthy for you to stand therein. In it are men who love to purify themselves; and Allah loves those who purify themselves."