Centralize builder request cloning

internal/framework/pipeline/validator_registry.go

@@ -150,7 +150,13 @@ func RegisterChunkValidatorBuilder(registry *ValidatorRegistry, spec ValidatorSp
 	if registry.chunkEntries == nil {
 		registry.chunkEntries = make(map[string]chunkValidatorEntry)
 	}
-	registry.chunkEntries[normalizedSpec.Key] = chunkValidatorEntry{spec: normalizedSpec, validateOptions: validateOptions, builder: builder}
+	registry.chunkEntries[normalizedSpec.Key] = chunkValidatorEntry{
+		spec:            normalizedSpec,
+		validateOptions: validateOptions,
+		builder: func(request BuildRequest) (contracts.ChunkValidator, error) {
+			return builder(cloneBuildRequest(request))
+		},
+	}
 	return nil
 }
 
@@ -187,7 +193,13 @@ func RegisterSerializedValidatorBuilder(registry *ValidatorRegistry, spec Serial
 	if registry.serializedEntries == nil {
 		registry.serializedEntries = make(map[string]serializedValidatorEntry)
 	}
-	registry.serializedEntries[spec.Key] = serializedValidatorEntry{spec: spec, validateOptions: validateOptions, builder: builder}
+	registry.serializedEntries[spec.Key] = serializedValidatorEntry{
+		spec:            spec,
+		validateOptions: validateOptions,
+		builder: func(request BuildRequest) (contracts.SerializedValidator, error) {
+			return builder(cloneBuildRequest(request))
+		},
+	}
 	return nil
 }