[PNNSGenerateDatabase] Batchsize > 1 fails `validate` due to only passing one vector.

Suppose we have a txtpb generated by `PNNSGenerateDatabase --output-database database.txtpb --row-count 10000 --vector-dimension 128 --metadata-size 100 --vector-type random` a 10000 element 128-dimension random vector database, and a config json ```json { "batchSize" : 2, "databasePacking" : { "diagonal" : { "babyStepGiantStep" : { "babyStep" : 12, "giantStep" : 11, "vectorDimension" : 128 } } }, "distanceMetric" : { "cosineSimilarity" : { } }, "extraPlaintextModuli" : [ ], "inputDatabase" : "database.txtpb", "outputDatabase" : "processed-database.binpb", "outputServerConfig" : "server-config.txtpb", "queryPacking" : { "denseRow" : { } }, "rlweParameters" : "n_4096_logq_27_28_28_logt_17", "trialTolerance" : 0.01, "trials" : 10 } ``` (This is directly copied from the suggested config.json, only changing batchSize from 1 to 2), And run `PNNSProcessDatabase config.json`, you get the error `Error: Validation error Wrong vector count 256, expected 128`.