The agent was reading participant metadata immediately after connecting,
but the mobile user might not have joined yet or metadata wasn't synced.
Changes:
- Replace extract_beneficiary_data() with wait_for_participant_with_metadata()
- Wait up to 10 seconds for participant with deploymentId
- Log waiting status every 2 seconds for debugging
- Fallback gracefully if timeout reached
This fixes "I couldn't get that information right now" error in voice calls.
ac6d458aae