Enable AND FORCE row-level security on every user-owned table (users, videos,
transcripts, summaries, summary_actions, sink_deliveries) per ADR-012. Each
policy keys off the per-request GUC tapir.current_user_id; an unset GUC yields
NULL → deny-all (the safe default).
FORCE is load-bearing: the app connects as the table owner (tapir), and owners
bypass RLS unless forced. Without FORCE the policies are dead for the prod user.
sink_deliveries has no user_id; its policy derives ownership from the summary it
belongs to via EXISTS against the GUC, so it is self-contained rather than
silently depending on summaries' own RLS being applied to a subquery.
Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
