[CI][Diag] Move dep-manifest dump to after pytest

Importing numpy before pytest registers the broken OpenBLAS atfork
handler in this shell, then Kit's libomni.platforminfo fork() trips
it and SIGSEGVs - exactly the bug isaac-sim#5642 targets.  Surface the
diagnostic AFTER pytest instead, with pytest's exit code preserved
so the job still passes/fails based on real test outcomes.

Author: hujc7

.github/actions/run-tests/action.yml

@@ -228,6 +228,16 @@ runs:
                     ;;
                 esac
               fi
+              echo 'Starting pytest with path: $test_path'
+              # Run pytest under a saved exit code so the dep-manifest diagnostic
+              # below always emits, even on test failure. The diagnostic must run
+              # AFTER pytest: importing numpy in this shell beforehand registers
+              # numpy's vendored OpenBLAS pthread_atfork handler in the wrong
+              # process, which trips Kit's libomni.platforminfo fork() and SIGSEGVs.
+              set +e
+              ./isaaclab.sh -p -m pytest --ignore=tools/conftest.py --ignore=source/isaaclab/test/install_ci $test_path $pytest_options -v --junitxml=tests/$result_file
+              PYTEST_EXIT=\$?
+              set -e
               # Diagnostic: dump numpy/scipy/openblas state so we can verify the
               # numpy!=2.3.5 pin landed in IsaacLab's setup.py prevents the broken
               # vendored OpenBLAS (libscipy_openblas64_-fdde5778.so) from being
@@ -238,8 +248,7 @@ runs:
               ./isaaclab.sh -p -m pip show numpy scipy 2>/dev/null | grep -E '^(Name|Version|Location):' || true
               ./isaaclab.sh -p -c \"import numpy, scipy, os; print('numpy', numpy.__version__); print('scipy', scipy.__version__); [print('bundled openblas:', os.path.join(d, f)) for d in [os.path.dirname(numpy.__file__) + '/../numpy.libs', os.path.dirname(scipy.__file__) + '/../scipy.libs'] if os.path.isdir(d) for f in os.listdir(d) if 'openblas' in f.lower()]\" 2>/dev/null || true
               echo '=== /Dep manifest ==='
-              echo 'Starting pytest with path: $test_path'
-              ./isaaclab.sh -p -m pytest --ignore=tools/conftest.py --ignore=source/isaaclab/test/install_ci $test_path $pytest_options -v --junitxml=tests/$result_file
+              exit \$PYTEST_EXIT
             "
 
           # Stream container logs in background.