Record Case provider timeout evidence

tools/validate_cto_child.py

@@ -326,11 +326,20 @@ REQUIRED_PROVIDER_BUILD_PRD_PHRASES = [
     "No Cortex Core, Case source, vendor source, or Target Repository file is mutated by admission.",
     "harness/evals/health.sh --json",
     "Stage 2 moves from provider-unavailable blocked status to a real Case pass report",
+    "9811f870af2f85616e359d42ba70566c9af08ca20d8660456929a56ec761513f",
+    "20260531T233721Z-r1-string-slugify-1814067",
+    "CTO-WORK-016` remains blocked because no real Case Stage 2 pass report exists",
+    "CTO-WORK-017 - Case Provider Timeout Fail-Closed Route",
+    "CTO_HARNESS_CASE_TIMEOUT_SECONDS",
+    "backend/provider-timeout.txt",
+    "provider_timeout_fail_closed",
+    "d23c492 Fail closed on Case provider timeout",
 ]
 
 REQUIRED_PROVIDER_BUILD_ISSUE_IDS = [
     "CTO-WORK-015",
     "CTO-WORK-016",
+    "CTO-WORK-017",
 ]
 
 
@@ -563,6 +572,7 @@ def main() -> int:
             "CTO-WORK-014": "validated",
             "CTO-WORK-015": "validated",
             "CTO-WORK-016": "blocked",
+            "CTO-WORK-017": "validated",
         }
         for issue_id, expected in expected_statuses.items():
             checked.append(f"workboard_status:{issue_id}:{expected}")