fix(tests): restore require_api_key in saved_views auth rejection tests

[SHAROZ221]

Description

Fixes failing auth rejection unit tests in testing/backend/unit/test_saved_views.py (test_unauthenticated_request_rejected and test_wrong_api_key_rejected).

Because app_client fixture sets _app.dependency_overrides[require_api_key] = _mock_require_api_key, requests with empty or incorrect API keys were bypassing authentication and returning 200 OK instead of 401 Unauthorized.

This PR temporarily restores require_api_key for those two auth rejection tests, bringing test_saved_views.py to 47/47 PASSED (100%).

Contributed as part of GSSoC (GirlScript Summer of Code).

Related Issues

Fixes failing auth tests in testing/backend/unit/test_saved_views.py.

Type of Change

• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to not work as expected)
• Documentation update

How Has This Been Tested?

Ran pytest directly on testing/backend/unit/test_saved_views.py:

.\venv_tests\Scripts\pytest testing/backend/unit/test_saved_views.py -v
Checklist
 My code follows the code style of this project.
 I have performed a self-review of my own code.
 I have commented my code, particularly in hard-to-understand areas.
 I have made corresponding changes to the documentation.
 My changes generate no new warnings.

[utksh1]

This branch includes the unrelated Windows documentation commit from #2060. Please rebase/split it so this PR contains only the saved-view authentication test repair, and add an assertion that the dependency override is restored after each negative-auth test.

[utksh1]

Please split the Windows-guide documentation commit into #2060 (or another docs PR). This PR should contain only the saved-views auth-test correction, plus a focused explanation of why the dependency override must be removed for these two negative tests.

[utksh1]

Closing as superseded by #2193. Both restore coverage for the skipped saved-view authentication assertions; #2193 does so with a smaller fixture-level change instead of mutating dependency overrides inside individual tests.