fix logreader after `segment_numbers` api removal (#32073)

fix

tools/lib/route.py

@@ -4,7 +4,6 @@ from functools import cache
 from urllib.parse import urlparse
 from collections import defaultdict
 from itertools import chain
-from typing import cast
 
 from openpilot.tools.lib.auth_config import get_token
 from openpilot.tools.lib.api import CommaApi
@@ -240,7 +239,9 @@ class SegmentName:
 def get_max_seg_number_cached(sr: 'SegmentRange') -> int:
   try:
     api = CommaApi(get_token())
-    return cast(int, api.get("/v1/route/" + sr.route_name.replace("/", "|"))["segment_numbers"][-1])
+    max_seg_number = api.get("/v1/route/" + sr.route_name.replace("/", "|"))["maxqlog"]
+    assert isinstance(max_seg_number, int)
+    return max_seg_number
   except Exception as e:
     raise Exception("unable to get max_segment_number. ensure you have access to this route or the route is public.") from e