Store the endpoint used for the selected address correction option

[gwendolyngoetz]

Description

Please explain the changes you made here.

Release notes

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Checklist

General

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• [ ] Added the correct label: < feature | enhancement | bug | under-development | dependencies | infrastructure | ignore-for-release | database >
• [ ] Assigned to a specific person, civiform/developers, or a more specific round-robin list
• [ ] Added an additional reviewer from outside your organization as FYI (if the primary reviewer is in the same organization as you)
• [ ] Created unit and/or browser tests which fail without the change (if possible)
• [ ] Performed manual testing (Chrome and Firefox if it includes front-end changes)
• [ ] Extended the README / documentation, if necessary

Database evolutions

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• [ ] Assigned two reviewers
• [ ] Guarded against already existing resources using IF NOT EXISTS and IF EXISTS
• [ ] Downs created to undo changes in Ups

User visible changes

• [ ] Followed steps to internationalize new strings
  • [ ] Added context strings to new messages
  • [ ] Didn't use a message in applicant facing code that isn't translated yet (unless behind a flag)
• [ ] Wrote browser tests using the validateAccessibility method
• [ ] Tested on mobile view. See mobile device mode
• [ ] Manually tested at 200% size
• [ ] Manually evaluated tab order

New Features

• [ ] Add new FeatureFlag env vars to server/conf/helper/feature-flags.conf
• [ ] Conditioned new functionality on a FeatureFlag
• [ ] Wrote browser tests with the feature flag off and on, etc.

Instructions for manual testing

If instructions are needed for manual testing by reviewers, include them here.

Issue(s) this completes

Fixes #<issue_number>; Fixes #<issue_number>...