Handle missing timeout in CI script

scripts/run_ci_tests.sh

@@ -1,9 +1,28 @@
 #!/usr/bin/env bash
 set -eo pipefail
-timeout 15m pytest -vv ${STRESS_ARGS} \
+
+pytest_cmd=(pytest -vv ${STRESS_ARGS} \
     --cov=src --cov-report=xml --cov-report=term-missing \
-    --cov-fail-under=20 src/tests 2>&1 | tee pytest.log
-status=${PIPESTATUS[0]}
+    --cov-fail-under=20 src/tests)
+
+timeout_bin="timeout"
+if ! command -v "$timeout_bin" >/dev/null 2>&1; then
+    if command -v gtimeout >/dev/null 2>&1; then
+        timeout_bin="gtimeout"
+    else
+        timeout_bin=""
+    fi
+fi
+
+if [[ -n "$timeout_bin" ]]; then
+    $timeout_bin 15m "${pytest_cmd[@]}" 2>&1 | tee pytest.log
+    status=${PIPESTATUS[0]}
+else
+    echo "timeout command not found; running tests without timeout" >&2
+    "${pytest_cmd[@]}" 2>&1 | tee pytest.log
+    status=${PIPESTATUS[0]}
+fi
+
 if [[ $status -eq 124 ]]; then
     echo "::error::Tests exceeded 15-minute limit"
     tail -n 20 pytest.log