Improve TeleSign logging

What does this MR do and why?

• TeleSign is 3rd party tool we use to verify user's phone number.
• This change to the logging structure makes it easier to track user journey by just running json.message: IdentityVerification*. This will give us a clear idea on how the user went verifying their email, phone and credit card.
• Logging the entire TeleSign response was logging too much information about a user's phone number which we don't want, so this change just logs the status of the response.
• Resolves https://gitlab.com/gitlab-org/modelops/anti-abuse/team-tasks/-/issues/342

Screenshots or screen recordings

Before

After

"message":"Received a risk score for a phone number from Telesign","telesign_response":{"reference_id":"661E381B66CC121C93010BC58EC0C749","sub_resource":"score","status":{"updated_on":"2023-04-17T07:03:46.462049Z","code":300,"description":"Transaction successfully completed"},"errors":[],"numbering":{"original":{"complete_phone_number":"1555","country_code":"1","phone_number":"555"},"cleansing":{"call":{"country_code":"1","phone_number":"555","cleansed_code":103,"min_length":null,"max_length":null},"sms":{"country_code":"1","phone_number":"555","cleansed_code":103,"min_length":null,"max_length":null}}},"risk_insights":{"status":800,"category":[10040],"a2p":[22001,20011,20101],"p2p":[30201],"number_type":[40004],"ip":[],"email":[]},"phone_type":{"code":"8","description":"INVALID"},"location":{"city":null,"state":null,"zip":null,"metro_code":null,"county":null,"country":{"name":"United States","iso2":"US","iso3":"USA"},"coordinates":{"latitude":null,"longitude":null},"time_zone":{"name":null,"utc_offset_min":null,"utc_offset_max":null}},"carrier":{"name":""},"blocklisting":{"blocked":false,"block_code":0,"block_description":"Not blocked"},"risk":{"level":"very-high","recommendation":"block","score":907}},"telesign_status_code":"200","user_id":"20"}

"class":"PhoneVerification::TelesignClient::RiskScoreService","message":"IdentityVerification::Phone","event":"Received a risk score for a phone number from Telesign","telesign_response":"Transaction successfully completed","telesign_status_code":"200","username":"iv1"}

How to set up and validate locally

1. Enable Phone Verification in rails console:

Feature.enable(:identity_verification)
Feature.enable(:identity_verification_phone_number)
ApplicationSetting.first.update(email_confirmation_setting: "hard", require_admin_approval_after_user_signup: false, 
telesign_customer_xid: "<FOUND_IN_1PASSWORD>", telesign_api_key: "<FOUND_IN_1PASSWORD>")

1. Sign-up as a new user. You will taken to the identity verification page where you will be asked to verify your email address.
2. Mark the user as medium risk in the console:

UserCustomAttribute.create(user: User.last, key: 'arkose_risk_band', value: 'MEDIUM')

1. Refresh the page, you should now see a section to verify your phone number.
2. Enter any phone number and click on Send code.
3. Look for a new log entry in log/application.log. You can search for IdentityVerification::Phone

MR acceptance checklist

This checklist encourages us to confirm any changes have been analyzed to reduce risks in quality, performance, reliability, security, and maintainability.

• I have evaluated the MR acceptance checklist for this MR.