We received customer reports that attachments in Twilio messages
required page reloads to appear. This issue occurred because in the old
Twilio builder, we saved the message and attachment in two stages. The
new builders follow a streamlined approach, where both are saved in a
single transaction. This update aligns the Twilio channel with the new
builder format and resolves the issue.
### Testing:
Tests cover the attachment cases, ensuring that all original tests pass
with these changes.
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