-- Reversal of 0005_grid_pipeline_link.sql (manual; .down files are never auto-applied).
--
-- SQLite < 3.35 cannot DROP COLUMN. The added column is nullable and ignored by any code
-- path predating it, so leaving it in place is harmless. The index drops freely. On
-- SQLite >= 3.35 the column itself may also be dropped.
DROP INDEX IF EXISTS idx_opportunities_fr_investor;
-- ALTER TABLE opportunities DROP COLUMN fundraising_investor_id;  -- SQLite >= 3.35 only