It's hard to say because it depends on how involved the architect was. That is an important consideration. Is their participation limited to providing some clarification or does it involve drafting the whole contract?
The first question is whether that person needed to be there when the contract was being drafted. Then, if people say they felt pressure, it's necessary to determine how much. Were they asked to provide quick responses or were they not allowed to ask certain questions?
You said you didn't get all the answers. It comes down to transparency. You were not given the answers, but that does not necessarily mean the documentation is non-existent. It may just mean you were not able to obtain it. Those are questions worth asking.
I am fairly certain that all the steps in the process were documented. Otherwise, I would be very surprised; that would be at odds with best practices. I find it hard to believe a senior official would not follow best practices deliberately. If there was any outside involvement, it was most likely documented in the file. At least I hope so.