docs(P16): complete workflow-parity-and-script-flags phase (v1.13.19)

---ci---
project: acdl
phase: 16
milestone: v1.14
status: complete
requirements:
  covered: [REQ-150]
  partial: []
---/ci---

tests/test_untested_scripts.py

@@ -98,8 +98,8 @@ class TestRotateSpikeKey:
 
     def test_has_set_flags(self):
         script = (ROOT / "scripts" / "rotate_spike_key.sh").read_text()
-        # P16 will add -e + pipefail; for now verify -u is present
-        assert "set -u" in script
+        # v1.14 (P16): set -euo pipefail (was only set -u)
+        assert "set -euo pipefail" in script
 
 
 class TestCreateStateBackend: