Add api key for use rest api

src/main/java/ru/soune/nocopy/entity/api/ApiKey.java

@@ -0,0 +1,68 @@
+package ru.soune.nocopy.entity.api;
+
+import jakarta.persistence.*;
+import lombok.AccessLevel;
+import lombok.Builder;
+import lombok.Getter;
+import lombok.NoArgsConstructor;
+
+import java.time.LocalDateTime;
+
+@Entity
+@Table(name = "api_keys")
+@Getter
+@NoArgsConstructor(access = AccessLevel.PROTECTED)
+public class ApiKey {
+    @Id
+    @GeneratedValue(strategy = GenerationType.IDENTITY)
+    private Long id;
+    @Column(name = "user_id", nullable = false)
+    private Long userId;
+
+    @Column(name = "key_hash", nullable = false, unique = true, length = 64)
+    private String keyHash;
+
+    @Column(nullable = false, length = 8)
+    private String prefix;
+
+    @Column(length = 255)
+    private String name;
+
+    @Column(name = "is_active", nullable = false)
+    private boolean isActive;
+
+    @Column(name = "created_at", nullable = false)
+    private LocalDateTime createdAt;
+
+    @Column(name = "expires_at")
+    private LocalDateTime expiresAt;
+
+    @Column(name = "last_used_at")
+    private LocalDateTime lastUsedAt;
+
+    @Builder
+    private ApiKey(Long userId, String keyHash, String prefix,
+                   String name, LocalDateTime expiresAt) {
+        this.userId = userId;
+        this.keyHash = keyHash;
+        this.prefix = prefix;
+        this.name = name;
+        this.isActive = true;
+        this.createdAt = LocalDateTime.now();
+        this.expiresAt = expiresAt;
+    }
+
+    public void markAsUsed() {
+        this.lastUsedAt = LocalDateTime.now();
+    }
+
+    public void revoke() {
+        this.isActive = false;
+    }
+
+    public boolean isValid() {
+        if (!isActive) return false;
+        if (expiresAt == null) return true;
+        return expiresAt.isAfter(LocalDateTime.now());
+    }
+}