/**
 * Poalim embeds the traded security's key in the transaction description, zero-padded:
 * `ניע"ז מכירה 0005129523` carries key `5129523`, `ניע"ז קניה 0077774297` carries `77774297`.
 * The padded form is what distinguishes a security key from the other digit runs that show
 * up in descriptions (amounts, dates, rates), so the leading zero is required rather than
 * incidental.
 *
 * Mirrors the rules `cron-jobs` uses to alias foreign-securities references — the
 * `(0[0-9]{7,})` regex in `cron-jobs.provider.ts` and `getEmbeddedReferenceAliases` in
 * `merge-charges-by-reference.helper.ts` — sharing `normalizeNumericReference` with them.
 *
 * Returns the normalized keys in the order they appear, de-duplicated. Matches
 * `accounter_schema.poalim_securities.security_key`, which the bank reports unpadded.
 */
export declare function extractSecurityKeys(description: string | null | undefined): string[];