Implement Trader V4 training artifact pipeline

src/test/java/com/quantai/trader/config/JacksonConfigTest.java

@@ -0,0 +1,17 @@
+package com.quantai.trader.config;
+
+import org.junit.jupiter.api.Test;
+
+import java.time.Instant;
+import static org.assertj.core.api.Assertions.assertThat;
+
+class JacksonConfigTest {
+    @Test
+    void createsObjectMapperWithJavaTimeSupport() throws Exception {
+        var mapper = new JacksonConfig().traderObjectMapper();
+
+        Instant value = mapper.readValue("\"2026-06-26T00:00:00Z\"", Instant.class);
+
+        assertThat(value).isEqualTo(Instant.parse("2026-06-26T00:00:00Z"));
+    }
+}