single-node-chaos-hardening: relax priority check from 3-tier to 2-tier (crucial > expendable)

chaos-hardening-priority-ordering.patch

--- a/tasks/single-node-chaos-hardening/grader.py
+++ b/tasks/single-node-chaos-hardening/grader.py
@@ -69,18 +69,23 @@ def validate_setup():
             all_ok = False

     # --- Priority Ordering Check ---
-    print("validating relative priority ordering")
-    t1 = get_effective_priority("bleater")
-    t2 = get_effective_priority("gitea")
-    t3 = get_effective_priority("loadgenerator")
-    if t1 > t2 > t3:
+    print("validating priority: crucial services above expendable")
+    crucial_ns = ["bleater", "argocd", "monitoring", "gitea", "harbor"]
+    expendable_ns = ["loadgenerator", "gitea-runner"]
+
+    crucial_priorities = {ns: get_effective_priority(ns) for ns in crucial_ns}
+    expendable_priorities = {ns: get_effective_priority(ns) for ns in expendable_ns}
+
+    min_crucial = min(crucial_priorities.values()) if crucial_priorities else 0
+    max_expendable = max(expendable_priorities.values()) if expendable_priorities else 0
+
+    if min_crucial > max_expendable and min_crucial > 0:
         feedback.append(
-            f"Priority ordering correct: Tier 1({t1}) > Tier 2({t2}) > Tier 3({t3})"
+            f"Priority ordering correct: crucial min({min_crucial}) > expendable max({max_expendable})"
         )
     else:
         feedback.append(
-            f"Priority ordering incorrect: Tier 1({t1}), Tier 2({t2}), Tier 3({t3})"
+            f"Priority ordering incorrect: crucial={crucial_priorities}, expendable={expendable_priorities}"
         )
         all_ok = False