SvelteKit row-builder cleanup when adding DB columns

When a Drizzle-free SQLite project has multiple modules each defining their own row→object mapper (e.g. one in the canonical module, plus locals in admin/backfill/ttl helpers), adding a column requires updating every mapper AND every SELECT column list — TypeScript only catches the type mismatch, the SELECT-list omissions silently return undefined. Grep both MESSAGE_COLS (or your constant) and every rowToMessage/rowTo* function in one pass; svelte-check will flag the type but not the missing SELECT.