feat: Add liquid template support for WhatsApp template parameters (#12227)
Extends liquid template processing to WhatsApp `template_params`,
allowing dynamic variable substitution in template parameter values.
Users can now use liquid variables in WhatsApp template parameters:
```
{
"template_params": {
"name": "greet",
"category": "MARKETING",
"language": "en",
"processed_params": {
"body": {
"customer_name": "{{contact.name}}",
"customer_email": "{{contact.email | default: 'no-email@example.com'}}"
}
}
}
}
```
When the message is saved, {{contact.name}} gets replaced with the
actual contact name.
Supported Variables
- {{contact.name}}, {{contact.email}}, {{contact.phone_number}}
- {{agent.name}}, {{agent.first_name}}
- {{account.name}}, {{inbox.name}}
- {{conversation.display_id}}
- Custom attributes: {{contact.custom_attribute.key_name}}
- Liquid filters: {{ contact.email | default: "fallback@example.com" }}
35d0a7f1a7