Add interfaces for Document.java and User.java

server/src/main/java/com/mixel/docusphere/entity/Document.java

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+package com.mixel.docusphere.entity;
+
+import jakarta.persistence.*;
+import java.util.UUID;
+import java.time.LocalDateTime;
+
+@Entity
+@Table(name = "Documents")
+public class Document {
+    @Id
+    @GeneratedValue(strategy = GenerationType.UUID)
+    @Column(name = "DocumentID", updatable = false, nullable = false)
+    private UUID documentId;
+
+    @Column(name = "Name", nullable = false)
+    private String name;
+
+    @Column(name = "S3Path", nullable = false)
+    private String s3Path;
+
+    @ManyToOne
+    @JoinColumn(name = "UserID", nullable = false)
+    private User user;
+
+    @Column(name = "CreatedAt", nullable = false, updatable = false)
+    private LocalDateTime createdAt;
+
+    @Column(name = "UpdatedAt", nullable = false)
+    private LocalDateTime updatedAt;
+
+    @PrePersist
+    protected void onCreate() {
+        createdAt = LocalDateTime.now();
+        updatedAt = LocalDateTime.now();
+    }
+
+    @PreUpdate
+    protected void onUpdate() {
+        updatedAt = LocalDateTime.now();
+    }
+
+    // Getters and Setters
+    public UUID getDocumentId() {
+        return documentId;
+    }
+
+    public void setDocumentId(UUID documentId) {
+        this.documentId = documentId;
+    }
+
+    public String getName() {
+        return name;
+    }
+
+    public void setName(String name) {
+        this.name = name;
+    }
+
+    public String getS3Path() {
+        return s3Path;
+    }
+
+    public void setS3Path(String s3Path) {
+        this.s3Path = s3Path;
+    }
+
+    public User getUser() {
+        return user;
+    }
+
+    public void setUser(User user) {
+        this.user = user;
+    }
+
+    public LocalDateTime getCreatedAt() {
+        return createdAt;
+    }
+
+    public void setCreatedAt(LocalDateTime createdAt) {
+        this.createdAt = createdAt;
+    }
+
+    public LocalDateTime getUpdatedAt() {
+        return updatedAt;
+    }
+
+    public void setUpdatedAt(LocalDateTime updatedAt) {
+        this.updatedAt = updatedAt;
+    }
+}

server/src/main/java/com/mixel/docusphere/entity/User.java

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+package com.mixel.docusphere.entity;
+
+import jakarta.persistence.*;
+import java.time.LocalDateTime;
+import java.util.UUID;
+
+@Entity
+@Table(name = "Users")
+public class User {
+    @Id
+    @GeneratedValue(strategy = GenerationType.UUID)
+    @Column(name = "UserID", updatable = false, nullable = false)
+    private UUID userId;
+
+    @Column(name = "Username", nullable = false, unique = true)
+    private String username;
+
+    @Column(name = "Name", nullable = false)
+    private String name;
+
+    @Column(name = "Email", nullable = false, unique = true)
+    private String email;
+
+    @Column(name = "PasswordHash", nullable = false)
+    private String passwordHash;
+
+    @Column(name = "PasswordSalt", nullable = false)
+    private String passwordSalt;
+
+    @Column(name = "CreatedAt", nullable = false, updatable = false)
+    private LocalDateTime createdAt;
+
+    @Column(name = "UpdatedAt", nullable = false)
+    private LocalDateTime updatedAt;
+
+    @PrePersist
+    protected void onCreate() {
+        createdAt = LocalDateTime.now();
+        updatedAt = LocalDateTime.now();
+    }
+
+    @PreUpdate
+    protected void onUpdate() {
+        updatedAt = LocalDateTime.now();
+    }
+
+    // Getters and Setters
+    public UUID getUserId() {
+        return userId;
+    }
+
+    public void setUserId(UUID userId) {
+        this.userId = userId;
+    }
+
+    public String getUsername() {
+        return username;
+    }
+
+    public void setUsername(String username) {
+        this.username = username;
+    }
+
+    public String getName() {
+        return name;
+    }
+
+    public void setName(String name) {
+        this.name = name;
+    }
+
+    public String getEmail() {
+        return email;
+    }
+
+    public void setEmail(String email) {
+        this.email = email;
+    }
+
+    public String getPasswordHash() {
+        return passwordHash;
+    }
+
+    public void setPasswordHash(String passwordHash) {
+        this.passwordHash = passwordHash;
+    }
+
+    public String getPasswordSalt() {
+        return passwordSalt;
+    }
+
+    public void setPasswordSalt(String passwordSalt) {
+        this.passwordSalt = passwordSalt;
+    }
+
+    public LocalDateTime getCreatedAt() {
+        return createdAt;
+    }
+
+    public void setCreatedAt(LocalDateTime createdAt) {
+        this.createdAt = createdAt;
+    }
+
+    public LocalDateTime getUpdatedAt() {
+        return updatedAt;
+    }
+
+    public void setUpdatedAt(LocalDateTime updatedAt) {
+        this.updatedAt = updatedAt;
+    }
+}

server/src/main/java/com/mixel/docusphere/repository/DocumentRepository.java

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+package com.mixel.docusphere.repository;
+
+import com.mixel.docusphere.entity.Document;
+import org.springframework.data.jpa.repository.JpaRepository;
+import java.util.UUID;
+
+public interface DocumentRepository extends JpaRepository<Document, UUID> {
+}

server/src/main/java/com/mixel/docusphere/repository/UserRepository.java

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+package com.mixel.docusphere.repository;
+
+import com.mixel.docusphere.entity.User;
+import org.springframework.data.jpa.repository.JpaRepository;
+import java.util.UUID;
+
+public interface UserRepository extends JpaRepository<User, UUID> {
+}