houses: one row per listing when a hand-added link is scraped later

The nightly scraper and worker API now take over an existing row (e.g. source=manual)
whose link is the same listing (normalized URL, or the Pararius key / Funda, Kamernet,
Vesteda id in it) instead of inserting a copy; typed values are kept where the scrape has
none. house-listing update/add give manual rows with such links the site key unless
another row has it, update accepts --source/--source-id, and lookups by link ignore
tracking params. scripts/house-rekey.ts backfills existing manual rows.

scripts/house-scrape.ts

@@ -241,7 +241,7 @@ try {
 		const completed = result.completed && result.listings.length > 0;
 		const ingest = await ingestListings(sql, name, result.listings, { runStartedAt, completed });
 		console.log(
-			`${name}: ${result.listings.length} seen, ${ingest.inserted.length} new${ingest.seeded ? ' (first run: seeded, no alerts)' : ''}, ${ingest.updated} updated, ${ingest.removed} gone`
+			`${name}: ${result.listings.length} seen, ${ingest.inserted.length} new${ingest.seeded ? ' (first run: seeded, no alerts)' : ''}, ${ingest.updated} updated${ingest.adopted ? ` (${ingest.adopted} hand-added rows taken over)` : ''}, ${ingest.removed} gone`
 		);
 		if (!ingest.seeded) for (const row of ingest.inserted) fresh.push({ ...row, source: name });
 	}