[API-35243] Add poa create request service - Part 2

[jvcAdHoc]

Summary

• This pr finishes the POA request orchestration service by adding a poa request creation service that chains the many BGS calls

Related issue(s)

• API-35243

Testing done

• New code is covered by unit tests
• Tested services locally with BGS proxy

What areas of the site does it impact?

Will impact claims api POA V2 once in use

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

[github-actions]

1 Error

🚫

This PR changes 777 LoC (not counting whitespace/newlines). In order to ensure each PR receives the proper attention it deserves, those exceeding 500 will not be reviewed, nor will they be allowed to merge. Please break this PR up into smaller ones. If you have reason to believe that this PR should be granted an exception, please see the Submitting pull requests for approval - FAQ. File Summary Files modules/claims_api/app/services/claims_api/power_of_attorney_request_service/create_request.rb (+272/-0) modules/claims_api/app/services/claims_api/power_of_attorney_request_service/orchestrator.rb (+6/-1) modules/claims_api/spec/lib/claims_api/vnp_proc_form_service_spec.rb (+1/-1) modules/claims_api/spec/services/power_of_attorney_request_service/create_request_spec.rb (+349/-0) modules/claims_api/spec/services/power_of_attorney_request_service/orchestrator_spec.rb (+138/-0) modules/claims_api/spec/services/power_of_attorney_request_service/terminate_existing_requests_spec.rb (+8/-1) Note: We exclude files matching the following when considering PR size: *.csv, *.json, *.tsv, *.txt, Gemfile.lock, app/swagger, modules/mobile/docs, spec/fixtures/, spec/support/vcr_cassettes/, modules/mobile/spec/support/vcr_cassettes/, db/seeds, modules/vaos/app/docs, modules/meb_api/app/docs, modules/appeals_api/app/swagger/, *.bru Big PRs are difficult to review, often become stale, and cause delays.

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[FonzMP]