test: introspect http client base_url safely

tests/test_integration.py

@@ -64,7 +64,10 @@ def qdrant_setup():
     # and what it holds (CI 404 diagnosis).
     import logging
     dbg = logging.getLogger("integration.debug")
-    dbg.warning("qdrant client url: %s", getattr(client, "_client", client).base_url if hasattr(client, "_client") else client)
+    try:
+        dbg.warning("qdrant client url: %s", client.http._client.base_url)
+    except Exception:
+        dbg.warning("qdrant client url: <introspection failed>")
     server_info = None
     try:
         server_info = client.get_collections()