Implement Trader V4 training artifact pipeline

src/main/java/com/quantai/trader/util/TraderNumbers.java

@@ -3,7 +3,6 @@ package com.quantai.trader.util;
 import java.math.BigDecimal;
 import java.math.MathContext;
 import java.util.Collection;
-import java.util.Objects;
 
 public final class TraderNumbers {
     public static final BigDecimal ZERO = BigDecimal.ZERO;
@@ -14,7 +13,10 @@ public final class TraderNumbers {
     }
 
     public static BigDecimal required(BigDecimal value, String field) {
-        return Objects.requireNonNull(value, field + " is required");
+        if (value == null) {
+            throw new IllegalArgumentException(field + " is required");
+        }
+        return value;
     }
 
     public static String requiredText(String value, String field) {
@@ -68,6 +70,9 @@ public final class TraderNumbers {
     }
 
     public static <T> Collection<T> requiredCollection(Collection<T> value, String field) {
-        return Objects.requireNonNull(value, field + " is required");
+        if (value == null) {
+            throw new IllegalArgumentException(field + " is required");
+        }
+        return value;
     }
 }