CREATE TABLE push_wake_outbox (
    community_id UUID NOT NULL REFERENCES communities(id),
    id UUID NOT NULL DEFAULT gen_random_uuid(),
    author BYTEA NOT NULL CHECK (length(author) = 32),
    installation_id TEXT NOT NULL,
    lease_generation BIGINT NOT NULL CHECK (lease_generation > 0),
    endpoint_hash BYTEA NOT NULL CHECK (length(endpoint_hash) = 32),
    event_id BYTEA NOT NULL CHECK (length(event_id) = 32),
    class TEXT NOT NULL CHECK (class IN ('silent','default','time_sensitive','urgent')),
    expires_at BIGINT NOT NULL,
    state TEXT NOT NULL DEFAULT 'pending' CHECK (state IN ('pending','sending','delivered','failed')),
    attempts INTEGER NOT NULL DEFAULT 0 CHECK (attempts >= 0),
    next_attempt_at TIMESTAMPTZ NOT NULL DEFAULT now(),
    lease_until TIMESTAMPTZ,
    claim_id UUID,
    created_at TIMESTAMPTZ NOT NULL DEFAULT now(),
    PRIMARY KEY (community_id, id),
    FOREIGN KEY (community_id, author, installation_id)
        REFERENCES push_leases (community_id, author, installation_id),
    UNIQUE (community_id, endpoint_hash, event_id)
);
CREATE INDEX push_wake_outbox_due
    ON push_wake_outbox (community_id, next_attempt_at) WHERE state = 'pending';
CREATE INDEX push_wake_outbox_recovery
    ON push_wake_outbox (community_id, lease_until) WHERE state = 'sending';