Set NDI_CLOUD_TEST_USER_HAS_MATLAB_LICENSE=true in test job env

The BYOL license guard in tests/_matlab_license_guard.py raises at
module-import time when this variable is unset, which collapses pytest
collection on the whole `tests/` tree (so all three test (3.x) matrix
entries fail before any test runs). The CI cloud test account already
has a registered MATLAB license, so destructive tests (DELETE
/users/me/matlab-license) must be skipped, not run; set the guard to
"true" to enforce that.

Author: stevevanhooser

.github/workflows/ci.yml

@@ -55,6 +55,12 @@ jobs:
         env:
           NDI_CLOUD_USERNAME: ${{ secrets.TEST_USER_2_USERNAME }}
           NDI_CLOUD_PASSWORD: ${{ secrets.TEST_USER_2_PASSWORD }}
+          # The CI test account already has a registered MATLAB license,
+          # so the destructive BYOL tests (DELETE /users/me/matlab-license)
+          # must be SKIPPED, not run. The license guard in
+          # tests/_matlab_license_guard.py enforces this at module-import
+          # time and refuses to run if this variable is unset.
+          NDI_CLOUD_TEST_USER_HAS_MATLAB_LICENSE: "true"
         run: |
           # Use sys.monitoring (PEP 669) on Python 3.12+ for faster coverage.
           # CTracer (sys.settrace) is catastrophically slow on 3.12 when