-- Per-tenant read-through cache; updated_ts drives TTL freshness.
CREATE TABLE IF NOT EXISTS public.cache (
    id          BIGSERIAL PRIMARY KEY,
    user_id     BIGINT NOT NULL REFERENCES public.user(id),
    tag         TEXT NOT NULL,
    data        JSONB NOT NULL,
    created_ts  TIMESTAMPTZ NOT NULL DEFAULT NOW(),
    updated_ts  TIMESTAMPTZ NOT NULL DEFAULT NOW(),
    CONSTRAINT uniq__cache__user_id_tag UNIQUE (user_id, tag)
);
CREATE INDEX IF NOT EXISTS idx__public__cache__user_id    ON public.cache (user_id);
CREATE INDEX IF NOT EXISTS idx__public__cache__tag        ON public.cache (tag);
CREATE INDEX IF NOT EXISTS idx__public__cache__created_ts ON public.cache (created_ts);
CREATE INDEX IF NOT EXISTS idx__public__cache__updated_ts ON public.cache (updated_ts);