Replace all 22 resolver Array<fn> patterns with Map<reqId, {resolve, timer}>.
Outgoing messages now include _reqId; on response the broker's echoed _reqId
is used for exact matching, with FIFO fallback for brokers that don't echo it.
Add makeReqId() helper and resolveFromMap() utility. Error propagation block
updated to iterate Maps and pop the oldest entry across all queues.
Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
8f925d9a9e