CREATE TYPE org_role AS ENUM ('owner', 'admin', 'member', 'viewer');

CREATE TABLE org_memberships (
    user_id UUID NOT NULL REFERENCES users(id) ON DELETE CASCADE,
    org_id UUID NOT NULL REFERENCES organizations(id) ON DELETE CASCADE,
    role org_role NOT NULL,

    created_at TIMESTAMPTZ NOT NULL DEFAULT now(),
    updated_at TIMESTAMPTZ NOT NULL DEFAULT now(),

    PRIMARY KEY (user_id, org_id)
);