The German→English rename (t-paliad-025) renamed the projects table and
ReminderService struct fields, but the SQL aliases in sendPerFrist /
sendWeekly still spelled `frist_title`, `akte_aktenzeichen`, and
`akte_title`. sqlx.SelectContext could not map them to the
`deadline_title` / `project_reference` / `project_title` `db:` tags, so
every hourly reminder scan returned a "missing destination name" error
and emails silently stopped going out.
This commit:
* renames struct fields AkteAktenzeichen/AkteTitle on fristReminderRow
and weeklyRow to ProjectReference/ProjectTitle and updates the `db:`
tags to project_reference / project_title.
* rewrites the SELECT aliases (deadline_title, project_reference,
project_title) to match.
* propagates the new keys through deliverFristReminder /
deliverWeekly into the email template data and renames the matching
variables in deadline_reminder.html and deadline_weekly.html.
* updates mail_service_test.go fixtures to the new keys.
* adds TestSendPerFrist_ScansCleanly — a live-DB regression test
(skips without TEST_DATABASE_URL) that seeds a project + deadline
and asserts sendPerFrist / sendWeekly scan without error, so a
future tag/alias drift fails CI instead of going silent.
d4abfb7299