[apostrophe-schemas] Date field is currently bubbling up a change event on initialization, causing the unsavedChanges field to be true before actually editing a form.

This creates some false positive 'Discard your changes' confirm dialogs. The change events during initialization should not propagate up.

Start at the apostrophe-schemas Date field initialization and trace how its change event reaches unsavedChanges. Reproduce form initialization without editing, then verify that initialization no longer propagates a change event or triggers a false “Discard your changes” dialog.

Written by the indexing model from the issue text.