add scrapers: Moerman & De Jong (API) and Schieland Borsboom (SSR)

- fetch_moerman: OG Online realtime-listings API (same platform as bjornd),
  includes bouwjaar from dateOfConstruction, energielabel, strips postcode space
- fetch_schielandborsboom: paginated HTML scraper filtered to Schiedam,
  fetches #kenmerken detail page for full specs (bouwjaar, kamers, etc.)

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

tests/test_adapters.py

@@ -16,7 +16,7 @@ logging.basicConfig(
 )
 
 # --- change this to test a different adapter ---
-ADAPTER = SCRAPERS['dupont']
+ADAPTER = SCRAPERS['schielandborsboom']
 
 if __name__ == "__main__":
     print(f"Testing adapter: {ADAPTER.__name__}")