-- Backfill search_vector for all existing documents.
-- The BEFORE UPDATE trigger (trg_documents_fts, installed by V34) recomputes
-- the full vector from title, summary, transcription blocks, sender/receiver
-- names, tags, and location. At backfill time all join tables already contain
-- data, so "SET title = title" is sufficient to fire the trigger for every row.
UPDATE documents SET title = title;
