List journal entries.

period_ids narrows to specific fiscal periods, and is how a caller asks for one fiscal year — the year's period ids (ZET-285). Without it this route listed, and counted, every fiscal year the company has: the Journal page cut the year out of the fetched page client-side while total stayed company-wide, so a year whose entries sat past the first page rendered as "no entries match" with no way to reach them. The service applies the filter before the count, so total is the filtered total and the pager is the year's.

untagged_subledger_control=true narrows to the entries that posted to an AR/AP control account without touching the subledger, under allow_untagged_control (ZET-150) — the postings a subledger-vs-control divergence traces back to.