59960 Truncate travel claim number to last4

[randomsync]

Summary

This PR truncates the travel claim number to last 4 since we don't want to send any PII/PHI data in text notifications.

team: check-in experience

Related issue(s)

• [BE] Replace Claim Number Sent to VA Notify for the SMS Content with Last 4 Digits Only va.gov-team#59960

Testing done

• rspecs
• local testing
• staging testing

What areas of the site does it impact?

• check-in experience text notification for travel claims

Acceptance criteria

• I fixed|updated|added unit tests and integration tests for each feature (if applicable).
• No error nor warning in the console.
• Events are being sent to the appropriate logging solution
• Documentation has been updated (link to documentation)
• No sensitive information (i.e. PII/credentials/internal URLs/etc.) is captured in logging, hardcoded, or specs
• Feature/bug has a monitor built into Datadog or Grafana (if applicable)
• If app impacted requires authentication, did you login to a local build and verify all authenticated routes work as expected
• I added a screenshot of the developed feature

Requested Feedback

(OPTIONAL)What should the reviewers know in addition to the above. Is there anything specific you wish the reviewer to assist with. Do you have any concerns with this PR, why?

[brianseek]

LGTM!

[lee-delarm6]

Looks good here, clean work!