Add direct connection fallback after all proxy attempts fail

When all 3 proxy rotation attempts are soft-blocked (bad IP pool), fall
back to the server's own IP for a final attempt. Keeps proxy as primary
for IP diversity / rate-limit protection while ensuring a clean fallback
when the assigned residential pool is Cloudflare-challenged.

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

backend/services/scraper_backends/playwright_local.py

@@ -550,6 +550,22 @@ class PlaywrightLocalBackend(ScraperBackend):
                 await self.rotate_session()
                 await asyncio.sleep(random.uniform(1.0, 2.0))
 
+        # All proxy attempts exhausted — fall back to direct connection. The
+        # server's own IP may be cleaner than the proxy pool currently assigned.
+        if self._proxy_enabled():
+            logger.warning(
+                f"All {max_attempts} proxy attempt(s) failed for {check_in} — "
+                "falling back to direct connection"
+            )
+            saved_proxy = self.proxy_config
+            self.proxy_config = {}
+            await self.rotate_session()  # closes proxy browser so next _ensure_context starts fresh
+            try:
+                result = await self._scrape_once(
+                    location, check_in, check_out, adults, pages, dest_id, location_params)
+            finally:
+                self.proxy_config = saved_proxy
+
         return result
 
     async def _scrape_once(