bd512f1eda
### What? This PR fixes an issue while using `text` & `number` fields with `hasMany: true` where the last entry would be unreachable, and thus undeletable, because the `transformForWrite` function did not track these rows for deletion. This causes values that should've been deleted to remain in the edit view form, as well as the db, after a submission. This PR also properly threads the placeholder value from `admin.placeholder` to `text` & `number` `hasMany: true` fields. ### Why? To remove rows from the db when a submission is made where these fields are empty arrays, and to properly show an appropriate placeholder when one is set in config. ### How? Adjusting `transformForWrite` and the `traverseFields` to keep track of rows for deletion. Fixes #11781 Before: [Editing---Post-dbpg-before--Payload.webm](https://github.com/user-attachments/assets/5ba1708a-2672-4b36-ac68-05212f3aa6cb) After: [Editing---Post--dbpg-hasmany-after-Payload.webm](https://github.com/user-attachments/assets/1292e998-83ff-49d0-aa86-6199be319937)