fix(llmobs): normalize dataset mutation responses

Author: mehulsonowal

packages/dd-trace/src/llmobs/experiments/client.js

@@ -197,7 +197,7 @@ class ExperimentsClient {
     const resources = Array.isArray(response?.records)
       ? response.records
       : (Array.isArray(response?.data) ? response.data : [])
-    return resources.map(datasetRecordFromResource)
+    return datasetMutationResultFromResources(resources)
   }
 
   async batchUpdateDatasetRecords (projectId, datasetId, attributes) {

packages/dd-trace/src/llmobs/experiments/noop.js

@@ -17,7 +17,7 @@ class NoopDataset {
       input: record.inputData,
       expectedOutput: record.expectedOutput ?? null,
       metadata: record.metadata ?? {},
-      tags: record.tags ?? [],
+      ...(record.tags === undefined ? {} : { tags: record.tags }),
     }))
   }
 
@@ -27,7 +27,7 @@ class NoopDataset {
       input,
       expectedOutput: expectedOutput ?? null,
       metadata: metadata ?? {},
-      tags: tags ?? [],
+      ...(tags === undefined ? {} : { tags }),
     })
     return this
   }