feat: add scrapers for vandriel, vanherk, vanoord

- vandriel (Schiedam): OG Online API, filtered by city=schiedam
- vanherk (Schiedam): SURE WordPress plugin (card-house), detail page kenmerken
- vanoord (Delft + Schiedam): Elementor WordPress, two filtered listing URLs, rw-object-features-list detail parsing
- makelaars.md: mark all three as done, add TODO for API scraper detail page enrichment

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

src/adapters/api.py

@@ -436,6 +436,69 @@ def fetch_doen() -> list[RawListing]:
     return listings
 
 
+# ---------------------------------------------------------------------------
+# Vandriel Makelaardij (Schiedam) — OG Online / realtime-listings
+# ---------------------------------------------------------------------------
+
+_VANDRIEL_BASE = "https://www.vandrielmakelaardij.nl"
+_VANDRIEL_SKIP = {"rented", "rented_ur"}
+
+_VANDRIEL_STATUS_MAP = {
+    "available":    "beschikbaar",
+    "under_bid":    "onder_bod",
+    "under_option": "onder_bod",
+    "sold":         "verkocht",
+    "sold_ur":      "verkocht",
+}
+
+
+def fetch_vandriel() -> list[RawListing]:
+    data = fetch_json(
+        f"{_VANDRIEL_BASE}/nl/realtime-listings/consumer",
+        headers={"X-Requested-With": "XMLHttpRequest"},
+    )
+
+    listings = []
+    for item in data:
+        if not item.get("isSales"):
+            continue
+        if item.get("statusOrig") in _VANDRIEL_SKIP:
+            continue
+        if (item.get("city") or "").lower() != "schiedam":
+            continue
+        if item.get("salesPrice", 0) > config.MAX_PRICE:
+            continue
+
+        postcode = (item.get("zipcode") or "").replace(" ", "") or None
+        perceel = item.get("plotSurface") or None
+        if perceel == 0:
+            perceel = None
+
+        raw_year = item.get("dateOfConstruction") or ""
+        bouwjaar = int(raw_year) if raw_year.isdigit() else None
+
+        listings.append(RawListing(
+            url=_VANDRIEL_BASE + item["url"],
+            source_makelaar="vandriel",
+            status=_VANDRIEL_STATUS_MAP.get(item.get("statusOrig", ""), "beschikbaar"),
+            adres=item.get("address") or None,
+            postcode=postcode,
+            stad=item.get("city") or None,
+            prijs=item.get("salesPrice") or None,
+            woningtype=item.get("type") or None,
+            woonoppervlak=item.get("livingSurface") or None,
+            perceeloppervlak=perceel,
+            kamers=item.get("rooms") or None,
+            slaapkamers=item.get("bedrooms") or None,
+            bouwjaar=bouwjaar,
+            energielabel=item.get("energyLabel") or None,
+            hero_image_url=item.get("photo") or None,
+        ))
+
+    log.info("vandriel: %d koopwoningen opgehaald", len(listings))
+    return listings
+
+
 # ---------------------------------------------------------------------------
 # SCRAPERS — exporteer hier alle actieve API adapters
 # ---------------------------------------------------------------------------
@@ -447,4 +510,5 @@ SCRAPERS = {
     'vandaal': fetch_vandaal,
     'elzenaar': fetch_elzenaar,
     'doen': fetch_doen,
+    'vandriel': fetch_vandriel,
 }