-- Extends research_topics.outcome_kind to include 'integrations' — a new
-- deliverable shape for "audit this repo, survey the literature, produce
-- a prioritized menu of concrete integrations we can implement" runs.
-- The artifact is a list of INT-XX items, each self-contained (what,
-- how, where in the architecture, prereqs, effort, risk, acceptance
-- criteria) so a downstream loop can consume them one-per-iteration.
--
-- The existing check constraint is dropped and re-added with the new
-- value; existing rows aren't affected. Postgres requires the drop
-- because you can't ALTER a constraint's expression in place.
ALTER TABLE research_topics
    DROP CONSTRAINT research_topics_outcome_kind_check;

ALTER TABLE research_topics
    ADD CONSTRAINT research_topics_outcome_kind_check
    CHECK (outcome_kind IN ('spec', 'prod_plan', 'roadmap', 'paper', 'integrations'));