Add API integration test coverage for all TRN request endpoint versions

[gunndabad]

Context

Integration tests for the CreateTrnRequest and GetTrnRequest API operations were missing for versions 20240307 and 20240606. The test files existed but were entirely commented out, as they referenced the old CRM-based implementation (XrmFakedContext, CrmQueryDispatcherSpy, .WithTrn(), .WithEmail(), etc.) which is no longer used.

Changes proposed in this pull request

• Uncommented and rewrote integration tests for CreateTrnRequest and GetTrnRequest for API versions 20240307, 20240606, 20250203, and 20250425, replacing obsolete CRM-based test code with the current Postgres/EF Core-based approach.

Version-specific behaviour covered:

• 20240307: Request uses a single Email field; response includes a person object (firstName, middleName, lastName, email, dateOfBirth, nationalInsuranceNumber) — no potentialDuplicate or accessYourTeachingQualificationsLink.
• 20240606: Request uses an EmailAddresses list; response is {requestId, status, trn} only — no person object, potentialDuplicate, or accessYourTeachingQualificationsLink.
• 20250203: Request uses an EmailAddresses list; response is {requestId, status, trn}.
• 20250425: Request uses an EmailAddresses list; response includes {requestId, status, trn, potentialDuplicate, accessYourTeachingQualificationsLink}.

Each version's tests cover: permission checks, request validation (invalid ID, ID length, date of birth, NINO), conflict detection, and happy-path completed/pending responses.

Guidance to review

Tests follow the same patterns as the existing V20250203 and V20250425 tests. Each version's TestBase sets the X-Api-Version header so requests are routed to the correct controller.

Checklist

• Attach to Trello card
• Rebased master
• Cleaned commit history
• Tested by running locally

[gunndabad]

@copilot ensure there is integration test coverage for the CreateTrnRequest and GetTrnRequest API operations for versions 20240307 and 20240606. Use the tests in this PR as a base.

[Copilot]

@copilot ensure there is integration test coverage for the CreateTrnRequest and GetTrnRequest API operations for versions 20240307 and 20240606. Use the tests in this PR as a base.

Done in commit 3de4f56. Uncommented and updated the integration tests for CreateTrnRequest and GetTrnRequest for both 20240307 and 20240606, replacing the old CRM-based test code with the new Postgres/EF Core approach matching the V20250203 and V20250425 patterns.

Key differences handled per version:

• 20240307: Request uses single Email field; response includes person object with firstName, middleName, lastName, email, dateOfBirth, nationalInsuranceNumber — no potentialDuplicate or accessYourTeachingQualificationsLink
• 20240606: Request uses EmailAddresses list; response is just {requestId, status, trn} — no person object, potentialDuplicate, or accessYourTeachingQualificationsLink