/**
 * Deterministic row ids for this package's idempotent writes (the
 * `TenantUsageMetric.recordUsage` precedent).
 *
 * A leaf module (no package-internal imports) so both consumers — usage counter
 * buckets and the global learning schedules — share one implementation. The
 * output is formatted as a v5-shaped UUID so id columns stay native UUID on
 * PostgreSQL/DuckDB.
 */
/**
 * SHA-256 over the namespaced parts, formatted as a v5-style UUID.
 *
 * The same parts always produce the same id, which is what turns
 * "check then create" into a race-free write: concurrent creators converge on
 * one primary key instead of inserting near-duplicate rows.
 */
export declare function deterministicFieldsUuid(parts: readonly string[]): Promise<string>;
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