Log event for new device alert job emails sent

[aduth]

🛠 Summary of changes

Adds logging to the worker job responsible for sending emails in response to expired sign-in attempts.

Why?

• For debuggability
• For parity with other similar jobs, e.g. account reset emails sent

📜 Testing Plan

Verify tests pass:

1. rspec spec/services/create_new_device_alert_spec.rb

Verify event logged in local development when job runs:

1. Run make watch_events in parallel to make run
2. (Optional) Visit http://localhost:3000 and sign-in before MFA
3. When job runs (every 5 minutes), observe logged event in terminal process with make watch_events with count of emails which were sent

[jmdembe]

👍🏾

[kevinsmaster5]

Looks / works good 👍

[zachmargolis]

this is logging across all users? or for each user?

[aduth]

The job runs independently of users (can dispatch emails for multiple users).

This was copied from how it's done in AccountReset::GrantRequestsAndSendEmails:

identity-idp/app/services/account_reset/grant_requests_and_send_emails.rb

Lines 23 to 30 in 708bd6b

	def analytics
	@analytics ||= Analytics.new(
	user: AnonymousUser.new,
	request: nil,
	sp: nil,
	session: {},
	)
	end