Baileys' sock.sendMessage() can hang indefinitely while uploading
media to WhatsApp servers (and, less often, on text sends), pinning
the bridge's Express handler until the gateway's aiohttp timeout
fires — surfacing to the user as a 120s wait followed by an empty
error from the TTS/voice path.
Wrap every sock.sendMessage() call inside the bridge in a
sendWithTimeout() helper that rejects after WHATSAPP_SEND_TIMEOUT_MS
(default 60s) via Promise.race. The four call sites are /send,
/edit, and /send-media's primary send. Express handlers catch the
rejection in their existing try/catch and return a real 500 to the
gateway, which can then surface a retryable error.
Salvaged from #2608 — wysie diagnosed the hang and the
Promise.race shape; the other two parts of that PR (gateway HTTP
session pooling, base.py metadata kwarg removal) already landed on
main via separate routes and are no longer needed.
Co-authored-by: Teknium <127238744+teknium1@users.noreply.github.com>
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