fix: nest market blueprint under post slug /<slug>/<market_slug>/

Market app now follows the events app pattern — URLs include
the post slug prefix (e.g. /market/suma-market/). Hydrate
loads both post and market, verifying market belongs to post.
Scraper default URLs updated accordingly.

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

scrape/persist_api/capture_listing.py

@@ -11,7 +11,7 @@ async def capture_listing(
     total_pages: int
 ):
     
-    sync_url = os.getenv("CAPTURE_LISTING_URL", "http://localhost:8001/suma-market/api/products/listing/")
+    sync_url = os.getenv("CAPTURE_LISTING_URL", "http://localhost:8001/market/suma-market/api/products/listing/")
 
     async with httpx.AsyncClient(timeout=httpx.Timeout(20.0, connect=10.0)) as client:
         _d = {