dbex/97956-separation-location-string: separation location code to string

[aurora-a-k-a-lightning]

Summary

• This work is behind a feature toggle (flipper): YES
• add missing separationLocationCode path

Related issue(s)

• EVSS -> LH BRD Migration: separation location codes are coming back as integers va.gov-team#97956

Testing done

• New code is covered by unit tests

What areas of the site does it impact?

(Describe what parts of the site are impacted andifcode touched other areas)

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 (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

[github-actions]

Backend-review-group approval confirmed.