Feed queries ran 5 correlated subqueries per row (3 COUNT + 2 EXISTS
for engagement counts and viewer context). Replaced with LEFT JOIN
aggregations computed once per query. Adds migration 016 with indexes
on likes(thought_id), boosts(thought_id), thoughts(in_reply_to_id),
and compound viewer-context indexes — expected to drop ~3s queries to
<100ms on typical page sizes.
Also removes WebFinger from the footer (requires query params, zero
standalone value as a link).
Gabriel Kaszewski
79f1e63bb8