Moved zeroes to computed field

Sources/SwiftNLP/1. Data Collection/HNSWCorpus.swift

@@ -27,7 +27,7 @@ class HNSWCorpus<Scalar: BinaryFloatingPoint & Codable>: SNLPCorpus {
             
 //    internal var _documentEncoder: ContextFreeEncoder<Scalar>
     internal var _documentEncoder: any SNLPEncoder
-    var zeroes: [Scalar]
+    var zeroes: [Scalar] { _documentEncoder.zeroes as! [Scalar] }
     
     var encodedDocuments: DeterministicSampleVectorIndex<[Scalar]>
     var count: Int { encodedDocuments.base.vectors.count }
@@ -36,13 +36,11 @@ class HNSWCorpus<Scalar: BinaryFloatingPoint & Codable>: SNLPCorpus {
     init(encoding: ContextFreeEncoder<Scalar>.PreComputedEmbeddings, scalar: Scalar.Type = Double.self,
          typicalNeighborhoodSize: Int = 20) {
         _documentEncoder = ContextFreeEncoder(source: encoding)
-        zeroes = _documentEncoder.zeroes as! [Scalar]
         encodedDocuments = DeterministicSampleVectorIndex<[Scalar]>(typicalNeighborhoodSize: typicalNeighborhoodSize)
     }
     
     init(encoder: any SNLPEncoder, scalar: Scalar.Type = Double.self, typicalNeighborhoodSize: Int = 20) {
         _documentEncoder = encoder
-        zeroes = _documentEncoder.zeroes as! [Scalar]
         encodedDocuments = DeterministicSampleVectorIndex<[Scalar]>(typicalNeighborhoodSize: typicalNeighborhoodSize)
     }