-- Slice 9 cleanup: retire the legacy research/loops surface.
--
-- The missions arc (Slices 1–9) fully replaced these tables. The
-- one-time backfill in 0047 copied every row into missions; no new
-- writes have hit these tables since the UI cutover in 4663348.
--
-- Drop order matters: children first, then parents. `research_topics`
-- has children `research_topic_agents`, `research_outcomes`,
-- `research_publish_approvals`. `loops` has children `loop_agents`,
-- `loop_orgs`, `loop_teams`.
--
-- topology_runs.research_topic_id / .loop_id / .iteration go too —
-- Slice 5 added mission_id + mission_phase_id which now own
-- attribution. `parent_run_id` (also from 0031) stays; recursive_exec
-- still uses it.

BEGIN;

ALTER TABLE topology_runs
    DROP COLUMN IF EXISTS research_topic_id,
    DROP COLUMN IF EXISTS loop_id,
    DROP COLUMN IF EXISTS iteration;

-- Loop-side children.
DROP TABLE IF EXISTS loop_agents;
DROP TABLE IF EXISTS loop_orgs;
DROP TABLE IF EXISTS loop_teams;

-- Research-side children.
DROP TABLE IF EXISTS research_publish_approvals;
DROP TABLE IF EXISTS research_outcomes;
DROP TABLE IF EXISTS research_topic_agents;

-- Parents.
DROP TABLE IF EXISTS loops;
DROP TABLE IF EXISTS research_topics;

COMMIT;