User Register: API testid & Mocked API testid

[MariannAdelbert]

Task 1:
Coverage: 100%
Time: 25.182 s

Task 2:
Coverage: 100%
Time: 0.579 s, estimated 1 s

The execution time of the mocked tests is significantly lower compared to the real API tests due to the removal of the artificial delay in email validation.

[github-actions]

API & Mocked Tests and Coverage

Purpose: Validate README requirements for regular tests, mocked email tests, coverage, and runtime comparison.
Status: ✅ PASS
Regular tests (app.test.js): ✅ PASS (25317ms)
Mocked tests (app.mock.test.js): ✅ PASS (1249ms)
Coverage gate (both runs at 100%): ✅ PASS
Runtime gate (regular ≥ mocked + 1500ms): ✅ PASS
Regular coverage (app.js): lines=100% | statements=100% | functions=100% | branches=100%
Mocked coverage (app.js only): lines=100% | statements=100% | functions=100% | branches=100%
Run details: https://github.com/tanjaq/User-Register/actions/runs/24310619367
PR checks: https://github.com/tanjaq/User-Register/pull/36/checks