-- Adds `Source.key` (`key String @unique`) — the catalog of implemented
-- recipe sources is now kept in sync with the adapter registry
-- (recipe-source-registry.ts) by key, same "stable English camelCase uid"
-- convention as Diet/Unit/TechStep, rather than hand-maintained. `sources`
-- has never been seeded (no rows exist pre-launch), so a plain NOT NULL
-- column with no backfill is safe.
--
-- Adds `Recipe.external_id` — the item's identifier on `source`, `null`
-- for a manually-authored recipe. `@@unique([sourceId, externalId])`
-- prevents importing the same source recipe twice; Postgres treats each
-- NULL as distinct, so manually-authored recipes (both columns null) never
-- collide with each other or with one another here.

-- AlterTable
ALTER TABLE "sources" ADD COLUMN "key" TEXT NOT NULL;

-- CreateIndex
CREATE UNIQUE INDEX "sources_key_key" ON "sources"("key");

-- AlterTable
ALTER TABLE "recipe" ADD COLUMN "external_id" TEXT;

-- CreateIndex
CREATE UNIQUE INDEX "recipe_source_id_external_id_key" ON "recipe"("source_id", "external_id");