goldenChat base source add

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

@@ -0,0 +1,67 @@
+package com.goldenchart.entity;
+
+import jakarta.persistence.*;
+import lombok.*;
+import org.hibernate.annotations.JdbcTypeCode;
+import org.hibernate.type.SqlTypes;
+
+import java.time.LocalDateTime;
+
+/**
+ * GoldenChart 투자전략 DSL 엔티티.
+ * frontend StrategyPage 에서 작성한 LogicNode 트리를 JSON 으로 저장.
+ */
+@Entity
+@Table(name = "gc_strategy")
+@Getter @Setter @NoArgsConstructor @AllArgsConstructor @Builder
+public class GcStrategy {
+
+    @Id
+    @GeneratedValue(strategy = GenerationType.IDENTITY)
+    private Long id;
+
+    /** 로그인 사용자 ID (nullable — 비회원은 device_id 사용) */
+    @Column(name = "user_id")
+    private Long userId;
+
+    /** 비회원 기기 식별자 */
+    @Column(name = "device_id", length = 100)
+    private String deviceId;
+
+    @Column(name = "name", nullable = false, length = 200)
+    private String name;
+
+    @Column(name = "description", columnDefinition = "TEXT")
+    private String description;
+
+    /** 매수 조건 DSL JSON — frontend LogicNode 구조 */
+    @Column(name = "buy_condition_json", columnDefinition = "JSON")
+    @JdbcTypeCode(SqlTypes.JSON)
+    private String buyConditionJson;
+
+    /** 매도 조건 DSL JSON — frontend LogicNode 구조 */
+    @Column(name = "sell_condition_json", columnDefinition = "JSON")
+    @JdbcTypeCode(SqlTypes.JSON)
+    private String sellConditionJson;
+
+    @Column(name = "enabled", nullable = false)
+    @Builder.Default
+    private Boolean enabled = true;
+
+    @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();
+    }
+}