Deletes every record of one file under every recorded spelling (image links,
tags, auto-tag marks, pending review items, category, collection memberships,
favorite) in one transaction. A Needs review item that is kept keeps its
annotation rows (ON DELETE RESTRICT). The image_removals table hides an exact
file (locator, size, mtime_ns) until it changes; linking skips a marked file,
and an explicit tag, category, favorite or collection write shows it again.
