/**
 * @schema IndexInfo
 * type: object
 * description: The index's metadata information.
 * x-schemaName: IndexInfo
 * required:
 *   - id
 *   - entity
 *   - status
 *   - fields
 *   - updated_at
 *   - last_synced_key
 * properties:
 *   id:
 *     type: string
 *     title: id
 *     description: The index's ID.
 *   entity:
 *     type: string
 *     title: entity
 *     description: The index's entity.
 *   status:
 *     type: string
 *     description: The index's syncing or ingesting status.
 *     enum:
 *       - pending
 *       - error
 *       - done
 *       - processing
 *   fields:
 *     type: array
 *     description: The index's fields.
 *     items:
 *       type: string
 *       title: fields
 *       description: The index's fields.
 *   updated_at:
 *     type: string
 *     format: date-time
 *     title: updated_at
 *     description: The date the index was last updated.
 *   last_synced_key:
 *     type: string
 *     title: last_synced_key
 *     description: The key of the last index sync.
 * 
*/