/**
 * Read child visor NDJSON trace file and re-emit spans
 * into the parent's telemetry context as proper child spans.
 *
 * NDJSON format from FileSpanExporter:
 *   { traceId, spanId, parentSpanId?, name, startTime: [s,ns], endTime: [s,ns],
 *     status: { code, message? }, attributes, events?, kind }
 */
/**
 * Ingest child trace NDJSON file and re-emit each span as a proper
 * child span under the current active parent span.
 *
 * Spans are created with their original startTime/endTime so they
 * appear with correct timing in the trace viewer.
 *
 * Gracefully degrades to no-op if OTel is not available.
 */
export declare function ingestChildTrace(filePath: string): void;
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