[perfromance][contact] Optimize contacts subscriptions

[flexsurfer]

Currently, we have lots of subscriptions for contacts with computations, we should move all that into events , we should have only subscriptions where we get contacts from app-db

Related issue: #10287

[churik]

@flexsurfer
is the issue still relevant according to the new design implementation?

[flexsurfer]

yes

[cammellos]

Moving to discussion, and we can re-open when ready to be worked on