Changing note type should not require a full sync

Changing a note type of a note row should not trigger a full sync. This change is no more complex than any update of the **notes** row. It should only involve an update of **mid** and **flds** columns. Eventually it should come to a delete followed by an insert on the server side.

No file or test is named. Trace the note-type update and sync handling for notes rows, focusing on changes to the mid and flds columns. Done means changing a note type avoids a full sync and limits the local update to those columns, with the intended server-side delete-and-insert behavior preserved.

Written by the indexing model from the issue text.