feat: track contributor lines

backend/src/main/java/com/openisle/model/ContributorConfig.java

@@ -0,0 +1,27 @@
+package com.openisle.model;
+
+import jakarta.persistence.*;
+import lombok.Getter;
+import lombok.NoArgsConstructor;
+import lombok.Setter;
+
+@Entity
+@Getter
+@Setter
+@NoArgsConstructor
+@Table(name = "contributor_configs")
+public class ContributorConfig {
+    @Id
+    @GeneratedValue(strategy = GenerationType.IDENTITY)
+    private Long id;
+
+    @Column(nullable = false, unique = true)
+    private String userIname;
+
+    @Column(nullable = false, unique = true)
+    private String githubId;
+
+    @Column(nullable = false)
+    private long contributionLines = 0;
+}
+

backend/src/main/java/com/openisle/model/MedalType.java

@@ -3,5 +3,6 @@ package com.openisle.model;
 public enum MedalType {
     COMMENT,
     POST,
+    CONTRIBUTOR,
     SEED
 }