In Telegram "important" notifications mode (default), TelegramPlatformAdapter
sets ``disable_notification=True`` on every send unless metadata carries
``notify=True``. GatewayRunner._send_voice_reply already passes thread
metadata through to ``adapter.send_voice``, but never marks the final
auto-TTS voice reply as notify-worthy — so users with the default mode get
the final voice note delivered silently with no push notification.
Mirror the final-text path in gateway/platforms/base.py (the existing
text-response final send already adds ``metadata["notify"] = True``).
Issue #27970 Bug 2. Bug 1 (MP3 vs. native OGG voice-note) is being
addressed by existing PRs #20182 / #20878 — this PR is intentionally
scoped to the silent-delivery bug only.
Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
