Perf issues around tracking ids when populate large invoice (or all invoices for an account)

[sbrossie]

The code inside invoice will populate the shell invoice with its items, payments, tags and tracking ids. However there are many code paths where such of these elements are not useful.

In particular, we should look at whether for internal use (e.g. invoice run), we could bypass tracking ids.

A more elaborate approach would be to make such loading lazy and only call it if such data is being used.