Wires DocumentTitleFormatter into DocumentImporter.buildDocument: the title
now reads "{index} – {honest date label} – {location}", so a MONTH-precision
letter's title says "Juni 1916" instead of a fabricated "1. Juni 1916", and an
UNKNOWN-date row keeps a bare index title. buildTitle stays under 20 lines by
delegating to the shared formatter (single source of truth with the UI label).
Restores the date+location title behavior that the old MassImportService had
(it appended a full GERMAN_DATE day) but now at the honest precision.
Refs #666
Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>
c816934391