-- Add soft-delete columns for Article and Comment.
ALTER TABLE "Article" ADD COLUMN IF NOT EXISTS "deletedAt" TIMESTAMP(3);
ALTER TABLE "Comment" ADD COLUMN IF NOT EXISTS "deletedAt" TIMESTAMP(3);

-- Index for filtering soft-deleted rows.
CREATE INDEX IF NOT EXISTS "Article_deletedAt_idx" ON "Article" ("deletedAt");
CREATE INDEX IF NOT EXISTS "Comment_deletedAt_idx" ON "Comment" ("deletedAt");

-- Standalone publishedAt index for homepage queries.
CREATE INDEX IF NOT EXISTS "Article_publishedAt_idx" ON "Article" ("publishedAt" DESC);