Fix Telegram voice replies during clarify

[baumar73]

Fixes Telegram voice/media replies to pending clarify prompts by preparing media text before falling through to interruption handling.

Tests:

• pytest tests/gateway/test_telegram_audio_vs_voice.py -q
• pytest tests/gateway/test_telegram_clarify_buttons.py -q
• py_compile gateway/run.py

[Morad37]

Makes sense. The clarify flow for voice/audio was the one input path that bypassed _prepare_inbound_message_text when a clarify was pending, so voice replies were silently dropped instead of being transcribed and delivered as answers. The early-return structure (check pending clarify before slash commands) is the right place to hook this in.

The test covers the real scenario well: place a clarify, send a voice reply, verify the clarify resolves instead of a new run starting.