What will the application scheme and principle of operation look like?

Question

Programming

Dear experts and masters. Question continuation Question I ask to advise to prompt. Essence of the question. Scheme and principle and application logic. Associate management companies in the houses in the city and the residents of these houses. we receive data from companies about their houses where they serve (by apartment) if a new person has been added (registered) to one of the apartments, do notify companies!
From the fias database, get all the houses from the management companies get their houses. Having received a mark, notify the company about a new registration.
How to store data from companies? city ​​- district - street - house - building - apartment. Should I break it like this or keep it raw? How to receive changes what houses are lost or received from companies? How to notify companies?

Answer 1

What does not suit the FIAS identifier as a reference?
What does not suit the address as a string, if you are not going to automate work with addresses in any way - but this is not visible in the task.
What does "how to notify" mean? What technologies do they agree/can receive notifications with?

Answer 2

You have not yet reached the design stage, as you have not fully analyzed the subject area.
At a glance: how to determine the owner or tenant by registration (“added (registered)” - you don’t even know the terms) - and these are completely different processing algorithms.