message: Remove unnecessary usage of Partial
diff: @@ -53,14 +53,14 @@ declare global {
  * A mapping of user IDs to Cursor instances for quick access
  * @defaultValue `{}`
  */
  - protected _cursors: Partial<Record<string, Cursor>>;
  + protected _cursors: Record<string, Cursor>;
  /**
  * A convenience mapping of user IDs to Ruler instances for quick access
  * @internal
  * @defaultValue `{}`
  */
  - protected _rulers: Partial<Record<string, Ruler>>;
  + protected _rulers: Record<string, Ruler>;
  /**
  * @remarks This is not overridden in foundry but reflects the real behavior.
  