Call user's emergency contact

Initiates an emergency call to the user's designated emergency contact (the contact with escalate_fired = 1). No request body is needed — the user's address on file is used for location data.

Performs the following validations before calling:

1. User must exist
2. User must have a confirmed emergency contact (escalate_fired = 1, is_confirmed = 1)
3. User must have a DID/Caller ID assigned
4. User must have an address on file

On success, sends an SMS and initiates a call to the emergency contact via the Fractel communicator, and logs the event.

Side Effects:

• Sends SMS to the emergency contact
• Initiates call to emergency contact via FracTel
• Creates reminders record
• Creates panic_logs record