The transfer of archives refers to the personnel of archives management units or institutions with archives management qualifications. What Beijing talent market says is that you stand in the position of talent market, and it doesn't mean that you can't go to Beijing after your files and registered permanent residence have entered institutions (these institutions have independent personnel file management qualifications)! In other words, as long as you have independent file management qualifications, you are qualified to transfer files and household registration!
As long as it is a unit that has been admitted to and hired civil servants and has the qualification of personnel file management, it can issue a transfer letter, and the transfer between organs, institutions and institutions, or cross-transfer, can be completed through the confidential bureau. As for the archives, as long as it is not a matter of principle, the employer-generally will not pursue it. So your worry is unnecessary!