houses: nightly Kamernet + Vesteda scraper, dedupe by address, owner-only /trackers/houses

- scripts/house-scrape.ts: polite nightly scrape (honest UA, 6-10 s apart, stops a source on 403/challenge), ingest + price history + removals, ntfy alerts on a separate topic (max 5 + summary, first run seeds)
- address_key + duplicate_of: copies on another source link to one listing, manual wins
- /projects/house-tracker -> /trackers/houses (308), owner only (404 otherwise); filters for min m2, rooms, source, Gouda region default; notes, add-by-hand form, total rent, also-on links
- scripts/house-db.sh: run the house-listing CLI as the limited house_cli role
- deploy/systemd/house-scrape.{service,timer}

src/lib/server/db/schema/house-tracker.ts

@@ -10,6 +10,7 @@ import {
 	text,
 	uniqueIndex
 } from 'drizzle-orm/pg-core';
+import type { AnyPgColumn } from 'drizzle-orm/pg-core';
 import { houseSchema } from './schemas';
 import { sql } from 'drizzle-orm';
 import { id, timestamptz } from './helpers';
@@ -55,7 +56,17 @@ export const houseListings = houseSchema.table(
 		removedAt: timestamptz('removed_at'),
 		alertedAt: timestamptz('alerted_at'),
 		status: text('status'),
-		notes: text('notes')
+		notes: text('notes'),
+		// Normalised street + number + city ("burgemeester van dijkesingel|214b|gouda"), only
+		// when the source gives a house number. Same key on another source = same home.
+		addressKey: text('address_key'),
+		// Set on the newer copy of a home that another source (or a manual entry) already has.
+		// The page shows the original and links the copies; status and notes live there.
+		duplicateOf: integer('duplicate_of').references((): AnyPgColumn => houseListings.id, {
+			onDelete: 'set null'
+		}),
+		// Monthly rent including service costs, when a source shows it separately.
+		totalPriceEur: integer('total_price_eur')
 	},
 	(table) => [
 		check('listings_offer_check', sql`offer IN ('rent', 'buy')`),
@@ -67,7 +78,10 @@ export const houseListings = houseSchema.table(
 		index('listings_city_idx').on(table.source, table.offer, table.citySlug),
 		index('listings_details_idx')
 			.on(table.firstSeenAt.desc().nullsFirst())
-			.where(sql`detail_fetched_at IS NULL`)
+			.where(sql`detail_fetched_at IS NULL`),
+		index('listings_address_idx')
+			.on(table.addressKey)
+			.where(sql`address_key IS NOT NULL`)
 	]
 );