Stu/prune external txs (#213)

Author: freemans13

stores/utxo/aerospike/create.go

@@ -854,8 +854,10 @@ func (s *Store) storeExternallyWithLock(
 	}
 
 	// Write to external blob storage (now protected by lock - no duplicate work)
+	// NOTE: Pass WithDeleteAt(0) to prevent DAH file creation. The pruner service will manage
+	// deletion of external files directly when pruning Aerospike records.
 	timeStart := time.Now()
-	if err := s.externalStore.Set(ctx, bItem.txHash[:], fileType, blobData); err != nil && !errors.Is(err, errors.ErrBlobAlreadyExists) {
+	if err := s.externalStore.Set(ctx, bItem.txHash[:], fileType, blobData, options.WithDeleteAt(0)); err != nil && !errors.Is(err, errors.ErrBlobAlreadyExists) {
 		utils.SafeSend[error](bItem.done, errors.NewStorageError("[%s] error writing to external store [%s]", funcName, bItem.txHash.String()))
 		return
 	}