Enable `ingest.ts` to import `db.ts` in REPL

src/ingest.ts

@@ -1,6 +1,6 @@
 import { join, dirname } from 'node:path'
 import fs from 'node:fs/promises';
-import {sql} from './db';
+import {sql} from './db.js';
 import {parse} from 'csv-parse/sync';