[web/keyserver] add source param on log in from web
Summary:
Add indication if login comes directly from web UI.
Additionally: I moved spreading ...extraInfo, to the first place because I believe it's unsafe (it might override some important fields when extraInfo will change).
Test Plan:
- Log request input here
- Log in from the web app
- Check if the source was properly received
Reviewers: tomek, atul, ashoat
Reviewed By: ashoat
Subscribers: ashoat, atul, abosh
Differential Revision: https://phab.comm.dev/D5257