Update failure policy references in YAML scenarios

Author: networmix

scenarios/nsfnet.yaml

@@ -173,7 +173,7 @@ failure_policy_set:
         rule_type: random
         probability: 0.0005     # 0.05 % chance a given node is down
 
-  default:
+  single_random_link_failure:
     attrs:
       description: Fails exactly one random link to test network resilience
     rules:
@@ -197,7 +197,7 @@ workflow:
     flow_placement: PROPORTIONAL
     iterations: 1000
     baseline: true
-    failure_policy: default
+    failure_policy: single_random_link_failure
     store_failure_patterns: true
   - step_type: CapacityEnvelopeAnalysis
     name: ce_2
@@ -207,7 +207,7 @@ workflow:
     parallelism: 8
     shortest_path: false
     flow_placement: PROPORTIONAL
-    iterations: 1000000
+    iterations: 10000
     baseline: true
     failure_policy: availability_1992
     store_failure_patterns: true

scenarios/simple.yaml

@@ -111,7 +111,7 @@ risk_groups:
   - name: srlg_12
 
 failure_policy_set:
-  default:
+  single_random_link_failure:
     attrs:
       description: "Fails exactly one random link to test network resilience"
     rules:
@@ -142,7 +142,7 @@ workflow:
   seed: 42
   iterations: 1000
   baseline: true           # Enable baseline mode
-  failure_policy: "default"
+  failure_policy: "single_random_link_failure"
 - step_type: CapacityEnvelopeAnalysis
   name: "ce_2"
   source_path: "^(spoke_.+)"