CREATE TABLE IF NOT EXISTS plugin_vertretung_absences (
  id INTEGER PRIMARY KEY AUTOINCREMENT,
  staff_id INTEGER NOT NULL,
  substitute_id INTEGER NOT NULL,
  start_date TEXT NOT NULL,
  end_date TEXT NOT NULL,
  note TEXT NOT NULL DEFAULT '',
  status TEXT NOT NULL DEFAULT 'planned',
  created_by INTEGER NULL,
  created_at TEXT NOT NULL
);
CREATE INDEX IF NOT EXISTS idx_plugin_vertretung_status ON plugin_vertretung_absences (status, start_date);
CREATE TABLE IF NOT EXISTS plugin_vertretung_moves (
  id INTEGER PRIMARY KEY AUTOINCREMENT,
  absence_id INTEGER NOT NULL,
  ticket_id INTEGER NOT NULL,
  from_staff_id INTEGER NOT NULL,
  to_staff_id INTEGER NOT NULL,
  created_at TEXT NOT NULL,
  returned_at TEXT NULL
);
CREATE INDEX IF NOT EXISTS idx_plugin_vertretung_moves_absence ON plugin_vertretung_moves (absence_id, returned_at)