/**
 * Bootstrap helper for the staff_events PostgreSQL table.
 *
 * The staff_events table is an append-only audit log for all Iranti staff
 * component actions (Librarian decisions, Attendant scans, conflict resolutions,
 * etc.). It is created on first use via `ensureStaffEventsTable()`, which runs
 * all DDL statements idempotently and coalesces concurrent calls into a single
 * in-flight promise so the table is never bootstrapped twice in the same process.
 *
 * Key exports:
 *   - ensureStaffEventsTable()          — idempotent table + index creation
 *   - resetStaffEventsTableBootstrap()  — reset ensured flag (test use only)
 */
export declare function resetStaffEventsTableBootstrap(): void;
export declare function ensureStaffEventsTable(): Promise<void>;
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