feat(coordinator): persist fenced execution authority and atomic results

backend/src/kf_oj/contracts/judge_state.py

@@ -27,7 +27,7 @@ class EvaluationState(StrEnum):
                 self.QUEUED,
             },
             self.RUNNING: {self.FINISHED, self.CANCELLING, self.FAILED, self.QUEUED},
-            self.CANCELLING: {self.CANCELLED, self.FAILED},
+            self.CANCELLING: {self.CANCELLED, self.FAILED, self.QUEUED},
         }
         return target in transitions.get(self, set())
 

backend/src/kf_oj/contracts/judging.py

@@ -352,12 +352,20 @@ class AdmissionPolicy(WireModel):
             raise ValueError("job exceeds trusted node budget")
 
 
+class StoppedReport(WireModel):
+    schema_version: Version
+    kind: Literal["judge.stopped"]
+    binding: LeaseBinding
+    cleanup_complete: StrictBool
+
+
 WIRE_MODELS = {
     "judge-manifest": JobManifest,
     "judge-lease": LeaseGrant,
     "judge-stage": StageReport,
     "judge-result": JudgementReport,
     "judge-admission": AdmissionPolicy,
+    "judge-stopped": StoppedReport,
 }