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    {"parameters":{"jsCode":"const i=$json.body??$json; const required=['providerEventId','caseKey','promptKey','promptVersion']; const missing=required.filter(k=>i[k]===undefined||i[k]===null||i[k]===''); if(missing.length)return[{json:{valid:false,error:`Missing aggregation fields: ${missing.join(', ')}`}}]; return[{json:{valid:true,providerEventId:String(i.providerEventId),caseKey:String(i.caseKey),promptKey:String(i.promptKey),promptVersion:Number(i.promptVersion),simulateLlmFailure:i.simulateLlmFailure===true,idempotencyKey:`diagnostic:aggregate:${i.providerEventId}`}}];"},"id":"d1130000-0000-4000-8000-000000000002","name":"Validate Aggregation Request","type":"n8n-nodes-base.code","typeVersion":2,"position":[-780,0]},
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    {"parameters":{"respondWith":"json","responseBody":"={{ JSON.stringify({ok:false,status:'aggregation-service-unavailable',retryable:true,adminAlertId:$json.alertId}) }}","options":{"responseCode":503}},"id":"d1130000-0000-4000-8000-000000000012","name":"Return Aggregation Failure","type":"n8n-nodes-base.respondToWebhook","typeVersion":1.4,"position":[400,40]}
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  "settings":{"executionOrder":"v1"},"pinData":{},"versionId":"d1130000-0000-4000-8000-000000000099","meta":{"templateCredsSetupCompleted":true},"tags":[]
}