update

src/main/java/research/loghunter/entity/Pattern.java

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+package research.loghunter.entity;
+
+import jakarta.persistence.*;
+import lombok.*;
+import java.time.LocalDateTime;
+
+@Entity
+@Table(name = "patterns")
+@Getter
+@Setter
+@NoArgsConstructor
+@AllArgsConstructor
+@Builder
+public class Pattern {
+
+    @Id
+    @GeneratedValue(strategy = GenerationType.IDENTITY)
+    private Long id;
+
+    @Column(nullable = false)
+    private String name;  // 패턴명 (예: NullPointer, DB Connection)
+
+    @Column(nullable = false, length = 1000)
+    private String regex;  // 정규식
+
+    @Column(nullable = false)
+    private String severity;  // CRITICAL, ERROR, WARN
+
+    @Column(nullable = false)
+    private Integer contextLines;  // 에러 전후 캡처할 라인 수
+
+    private String description;  // 설명
+
+    @Column(nullable = false)
+    private Boolean active;
+
+    @Column(nullable = false, updatable = false)
+    private LocalDateTime createdAt;
+
+    private LocalDateTime updatedAt;
+
+    @PrePersist
+    protected void onCreate() {
+        createdAt = LocalDateTime.now();
+        updatedAt = LocalDateTime.now();
+        if (active == null) active = true;
+        if (contextLines == null) contextLines = 5;
+        if (severity == null) severity = "ERROR";
+    }
+
+    @PreUpdate
+    protected void onUpdate() {
+        updatedAt = LocalDateTime.now();
+    }
+}