/**
 * A step's name is per step-TYPE, so a fan-out of N identical activities (e.g.
 * 9× "Scrape Serp Page") all share one label and become indistinguishable.
 * Number the repeats in chronological order so each instance is addressable —
 * "Scrape Serp Page #1", "#2", …. Labels that occur once are left untouched.
 *
 * Pass spans in their stored (chronological) order so #1 is the earliest. A
 * TypeScript port of Atlas's `buildSpanLabels`.
 */
import type { Span } from '#services/workflow_history/correlator.js';
export default function buildSpanLabels(spans: Span[]): Map<string, string>;