-- AP1.8a: Portfolio-Priorität (relatives Ranking im Tenant)

ALTER TABLE initiatives
    ADD COLUMN IF NOT EXISTS portfolio_rank INT;

WITH ranked AS (
    SELECT
        id,
        ROW_NUMBER() OVER (
            PARTITION BY tenant_id
            ORDER BY updated_at DESC, title
        ) - 1 AS rn
    FROM initiatives
)
UPDATE initiatives AS i
SET portfolio_rank = ranked.rn
FROM ranked
WHERE i.id = ranked.id AND i.portfolio_rank IS NULL;

CREATE INDEX IF NOT EXISTS idx_initiatives_tenant_portfolio_rank
    ON initiatives (tenant_id, portfolio_rank);

COMMENT ON COLUMN initiatives.portfolio_rank IS
    'Relatives Portfolio-Ranking (0 = höchste Aufmerksamkeit). AP1.8a';