curl -X PUT "http://localhost:8080/api/admin/documents/bulk" \
  -H "Content-Type: application/x-ndjson" \
  -u admin:admin \
  --data-binary @documents.ndjson
```

**Required Fields**:
- `url` - Unique document identifier/URL
- `title` - Document title
- `content` - Full text content

**Optional Fields**:
- `mimetype` - MIME type (default: text/html)
- `filetype` - File extension (default: html)

     * <p>
     * This method looks up a character mapping item using its unique identifier
     * within the context of the specified dictionary.
     * </p>
     *
     * @param dictId the dictionary ID containing the character mapping item
     * @param id the unique identifier of the character mapping item
     * @return an OptionalEntity containing the character mapping item if found, empty otherwise

 * This form is used in the admin interface to upload custom stemmer override dictionary files.
 */
public class UploadForm {

    /**
     * The dictionary ID that identifies which stemmer override dictionary configuration to update.
     * This ID corresponds to a specific stemmer override dictionary instance in the system.
     */
    @Required
    public String dictId;

    /**

 * This form is used in the admin interface to upload custom user dictionaries for Kuromoji.
 */
public class UploadForm {

    /**
     * The dictionary ID that identifies which Kuromoji dictionary configuration to update.
     * This ID corresponds to a specific Kuromoji dictionary instance in the system.
     */
    @Required
    public String dictId;

    /**

 *
 */
public class EditForm extends CreateForm {

    /**
     * Creates a new EditForm instance.
     */
    public EditForm() {
        super();
    }

    /**
     * The unique identifier of the related content configuration being edited.
     * This is a required field for identifying which related content entry to update.
     */
    @Required
    @Size(max = 1000)
    public String id;

    /**

 */
public class EditForm extends CreateForm {

    /**
     * Creates a new EditForm instance.
     */
    public EditForm() {
        super();
    }

    /**
     * The unique identifier of the web authentication configuration being edited.
     * This is a required field for identifying which web authentication entry to update.
     */
    @Required
    @Size(max = 1000)
    public String id;

 *
 */
public class EditForm extends CreateForm {

    /**
     * Creates a new EditForm instance.
     */
    public EditForm() {
        super();
    }

    /**
     * The unique identifier of the data configuration being edited.
     * This is a required field for identifying which data config to update.
     */
    @Required
    @Size(max = 1000)
    public String id;

    /**

 *
 */
public class EditForm extends CreateForm {

    /**
     * Creates a new EditForm instance.
     */
    public EditForm() {
        super();
    }

    /**
     * The unique identifier of the group being edited.
     * This is a required field for identifying which group to update.
     */
    @Required
    @Size(max = 1000)
    public String id;

    /**

 *
 */
public class EditForm extends CreateForm {

    /**
     * Creates a new EditForm instance.
     */
    public EditForm() {
        super();
    }

    /**
     * The unique identifier of the path mapping configuration being edited.
     * This is a required field for identifying which path map to update.
     */
    @Required
    @Size(max = 1000)
    public String id;

    /**

import java.util.concurrent.CopyOnWriteArrayList;

/**
 * Represents a chat session containing conversation history.
 *
 * @author FessProject
 */
public class ChatSession {

    /** The unique session identifier. */
    private String sessionId;

    /** The user ID associated with this session. */
    private String userId;

    /** The timestamp when the session was created. */
    private LocalDateTime createdAt;