add via_ip.estimate_location using binary search

my/config.py

@@ -66,17 +66,18 @@ class google:
 
 
 from typing import Sequence, Union, Tuple
-from datetime import datetime, date
+from datetime import datetime, date, timedelta
 DateIsh = Union[datetime, date, str]
 LatLon = Tuple[float, float]
 class location:
     # todo ugh, need to think about it... mypy wants the type here to be general, otherwise it can't deduce
     # and we can't import the types from the module itself, otherwise would be circular. common module?
     home: Union[LatLon, Sequence[Tuple[DateIsh, LatLon]]] = (1.0, -1.0)
-    home_accuracy = 1000.0
+    home_accuracy = 30_000.0
 
     class via_ip:
         accuracy: float
+        for_duration: timedelta
 
     class gpslogger:
         export_path: Paths = ''