goldenChat base source add

backend/src/main/java/com/goldenchart/entity/GcHoldings.java

@@ -0,0 +1,66 @@
+package com.goldenchart.entity;
+
+import jakarta.persistence.*;
+import lombok.*;
+
+import java.math.BigDecimal;
+import java.time.LocalDateTime;
+
+/**
+ * 보유종목.
+ */
+@Entity
+@Table(name = "gc_holdings",
+    uniqueConstraints = @UniqueConstraint(name = "uk_holdings_user_symbol",
+        columnNames = {"user_id", "device_id", "symbol"}))
+@Getter @Setter @NoArgsConstructor @AllArgsConstructor @Builder
+public class GcHoldings {
+
+    @Id
+    @GeneratedValue(strategy = GenerationType.IDENTITY)
+    private Long id;
+
+    @Column(name = "user_id")
+    private Long userId;
+
+    @Column(name = "device_id", length = 100)
+    private String deviceId;
+
+    @Column(name = "symbol", length = 50, nullable = false)
+    private String symbol;
+
+    @Column(name = "korean_name", length = 100)
+    private String koreanName;
+
+    @Column(name = "english_name", length = 100)
+    private String englishName;
+
+    /** 평균 매입가 */
+    @Column(name = "avg_price", precision = 30, scale = 8)
+    private BigDecimal avgPrice;
+
+    /** 보유 수량 */
+    @Column(name = "quantity", precision = 30, scale = 8)
+    private BigDecimal quantity;
+
+    @Column(name = "display_order")
+    @Builder.Default
+    private Integer displayOrder = 0;
+
+    @Column(name = "created_at", nullable = false, updatable = false)
+    private LocalDateTime createdAt;
+
+    @Column(name = "updated_at")
+    private LocalDateTime updatedAt;
+
+    @PrePersist
+    protected void onCreate() {
+        createdAt = LocalDateTime.now();
+        updatedAt = LocalDateTime.now();
+    }
+
+    @PreUpdate
+    protected void onUpdate() {
+        updatedAt = LocalDateTime.now();
+    }
+}