fix(auth): clean up stale test users before signup in integration tests

[PierreBrisorgueil]

Summary

• Auth integration tests used hardcoded emails without database cleanup before each run
• On shared MongoDB instances (ARC self-hosted runners), stale data from previous CI runs caused cascading test failures (signup returns 422 instead of 200)
• Added pre-signup purgeUser cleanup in all beforeAll/beforeEach hooks across the four auth integration test files

Files changed

• modules/auth/tests/auth.integration.tests.js — Registration, Password reset, Security, Email verification, Account lockout sections
• modules/auth/tests/auth.abilities.integration.tests.js — beforeAll cleanup
• modules/auth/tests/auth.authorization.integration.tests.js — beforeAll cleanup
• modules/auth/tests/auth.signup.organization.integration.tests.js — per-test cleanup via purgeUser helper (also cleans org/membership data)

Test plan

• All 92 auth integration tests pass locally (50 + 9 + 27 + 6)
• All 492 unit tests pass
• Lint passes with no errors
• CI green on shared MongoDB runner

Closes #3437

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Run ID: 014ebe12-51b9-4a17-ae2d-0e6d473c4cc4

📥 Commits

Reviewing files that changed from the base of the PR and between b4e2da9 and 4f04285.

📒 Files selected for processing (4)

• modules/auth/tests/auth.abilities.integration.tests.js
• modules/auth/tests/auth.authorization.integration.tests.js
• modules/auth/tests/auth.integration.tests.js
• modules/auth/tests/auth.signup.organization.integration.tests.js

✨ Finishing Touches

🧪 Generate unit tests (beta)

• Create PR with unit tests
• Commit unit tests in branch fix/auth-integration-cleanup-3437

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[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 85.51%. Comparing base (b4e2da9) to head (4f04285).
⚠️ Report is 4 commits behind head on master.

Additional details and impacted files

@@           Coverage Diff           @@
##           master    #3441   +/-   ##
=======================================
  Coverage   85.51%   85.51%           
=======================================
  Files         113      113           
  Lines        2879     2879           
  Branches      795      795           
=======================================
  Hits         2462     2462           
  Misses        331      331           
  Partials       86       86           

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[Copilot]

Pull request overview

Fixes auth integration test flakiness on shared MongoDB runners by proactively removing stale users before signups that use hardcoded emails.

Changes:

• Added pre-signup cleanup (via UserService.getBrut + UserService.remove) in beforeAll/beforeEach hooks across auth integration test suites.
• Introduced a purgeUser(email) helper in the signup-organization integration tests and called it before creating users with fixed emails.
• Applied the cleanup pattern to authorization and abilities integration tests to prevent cascading failures from prior CI runs.

Reviewed changes

Copilot reviewed 4 out of 4 changed files in this pull request and generated 1 comment.

File	Description
modules/auth/tests/auth.integration.tests.js	Purges known hardcoded test users before registration/password reset/security/verification/lockout setup.
modules/auth/tests/auth.abilities.integration.tests.js	Purges abilities test users before creating them in beforeAll.
modules/auth/tests/auth.authorization.integration.tests.js	Purges authorization test users before creating them in beforeAll.
modules/auth/tests/auth.signup.organization.integration.tests.js	Adds purgeUser helper and uses it to remove stale org-signup users prior to signup requests.