Stroke - Supernote

Field	Type	Description
`penColor`	`number`	Pen color: `0x00` (black), `0x9D` (dark gray), `0xC9` (light gray), `0xFE` (white)
`penType`	`number`	Pen type: `10` technical pen, `16` pressure pen, `11` marker pen, `14` calligraphy
`points`	`ElementDataAccessor<Point>`	Sample points (EMR coordinates)
`pressures`	`ElementDataAccessor<number>`	Pressure data (`0..4096`)
`eraseLineTrailNums`	`ElementDataAccessor<number>`	Erase line data
`flagDraw`	`ElementDataAccessor<boolean>`	Write flag
`markPenDirection`	`ElementDataAccessor<Point>`	Marker pen direction
`recognPoints`	`ElementDataAccessor<RecognData>`	Recognition point data. Can be used with MyScript and other recognition libraries to generate corresponding text (pixel coordinates)

points/pressures/eraseLineTrailNums/flagDraw/markPenDirection/recognPoints are all ElementDataAccessor accessor objects, not full arrays. Fetch data asynchronously via size()/get()/getRange() to avoid JS memory issues caused by transferring large point sets at once.