CREATE TABLE IF NOT EXISTS wiki_recovery_budgets (
    tenant_id BIGINT NOT NULL,
    dead_letter_id BIGINT NOT NULL,
    attempt_number INTEGER NOT NULL,
    pending_op_id BIGINT NOT NULL,
    knowledge_base_id VARCHAR(36) NOT NULL,
    knowledge_id VARCHAR(36) NOT NULL,
    model_id VARCHAR(36) NOT NULL,
    embedding_model_id VARCHAR(36) NOT NULL DEFAULT '',
    source_fingerprint VARCHAR(64) NOT NULL,
    model_fingerprint VARCHAR(64) NOT NULL,
    reviewed_release VARCHAR(255) NOT NULL,
    reviewed_api_image VARCHAR(255) NOT NULL,
    max_provider_requests BIGINT NOT NULL CHECK (max_provider_requests > 0),
    reserved_provider_requests BIGINT NOT NULL DEFAULT 0 CHECK (reserved_provider_requests >= 0 AND reserved_provider_requests <= max_provider_requests),
    deadline_at TIMESTAMPTZ NOT NULL,
    status VARCHAR(32) NOT NULL DEFAULT 'active',
    stop_reason VARCHAR(128) NOT NULL DEFAULT '',
    last_phase VARCHAR(64) NOT NULL DEFAULT '',
    paused_payload TEXT NOT NULL,
    verified_progress TEXT NOT NULL,
    created_at TIMESTAMPTZ NOT NULL DEFAULT CURRENT_TIMESTAMP,
    updated_at TIMESTAMPTZ NOT NULL DEFAULT CURRENT_TIMESTAMP,
    PRIMARY KEY (tenant_id, dead_letter_id, attempt_number, pending_op_id),
    UNIQUE (tenant_id, pending_op_id)
);