enable sms-notifications in platform-test

[jrpbc]

Ticket

Resolves #271

Changes

This PR enables SMS Notifications in platform-test app

Testing

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Preview environment for app-catala

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Preview environment for app-flask

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Preview environment for app-nextjs

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Preview environment for app-rails

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Preview environment for app

• Service endpoint: https://p-272-app-dev-1228997415.us-east-1.elb.amazonaws.com
• Deployed commit: 57d923c

[Copilot]

Pull request overview

Enables AWS End User Messaging SMS notifications for the infra/app (platform-test) Terraform app configuration so the service can provision SMS-related infrastructure and environment variables.

Changes:

• Turn on enable_sms_notifications in the app’s Terraform locals.

[Copilot]

Enabling enable_sms_notifications here will turn on SMS resources for dev/staging/prod, but the env configs don’t pass sms_sender_phone_number_registration_id/sms_number_type. With the current defaults, notifications-phone-pool will provision a SIMULATOR number (no real SMS delivery). If the intent is real SMS delivery, wire those variables through in the relevant infra/app/app-config/{dev,staging,prod}.tf (or add a validation to fail when enable_sms_notifications is true in non-dev without a registration ID).