Fix date formatting in query filters to use date object directly

* Pass the timezone-aware datetime object directly to the __gte filter instead of converting it to a naive date string with .date().isoformat()

Author: polyaxon-ci

cli/polyaxon/_pql/builder.py

@@ -287,7 +287,7 @@ def _eq_operator(name: str, params: Any, query_backend: Any, timezone: str) -> A
         if params == "last_month":
             params_value = get_datetime_from_now(days=30)
             filters = {
-                f"{name}__gte": params_value.date().isoformat(),
+                f"{name}__gte": params_value.date(),
             }
             return query_backend(**filters)
         try: