BEGIN;

CREATE TABLE platform_health_snapshot (
    id            bigserial PRIMARY KEY,
    public_id     uuid NOT NULL UNIQUE DEFAULT gen_random_uuid(),
    schema_name   varchar(64) NOT NULL CHECK (schema_name='platform-server-health-v1'),
    status        varchar(16) NOT NULL CHECK (status IN ('healthy','warning','critical')),
    observed_at   timestamptz NOT NULL,
    received_at   timestamptz NOT NULL DEFAULT now(),
    checks        jsonb NOT NULL,
    body_digest   char(64) NOT NULL UNIQUE,
    CONSTRAINT platform_health_checks_array CHECK (jsonb_typeof(checks)='array')
);

CREATE INDEX platform_health_snapshot_observed_idx
    ON platform_health_snapshot(observed_at DESC, id DESC);

COMMIT;