Convert TOTs to datetime.

https://github.com/dcs-liberation/dcs_liberation/issues/1680

game/groundunitorders.py

@@ -2,6 +2,7 @@ from __future__ import annotations
 
 import logging
 from collections import defaultdict
+from datetime import datetime
 from typing import Optional, TYPE_CHECKING
 
 from game.theater import ControlPoint
@@ -52,7 +53,7 @@ class GroundUnitOrders:
             pending_units = 0
         return pending_units
 
-    def process(self, game: Game) -> None:
+    def process(self, game: Game, now: datetime) -> None:
         coalition = game.coalition_for(self.destination.captured)
         ground_unit_source = self.find_ground_unit_source(game)
         if ground_unit_source is None:
@@ -95,15 +96,20 @@ class GroundUnitOrders:
                     "still tried to transfer units to there"
                 )
             ground_unit_source.base.commission_units(units_needing_transfer)
-            self.create_transfer(coalition, ground_unit_source, units_needing_transfer)
+            self.create_transfer(
+                coalition, ground_unit_source, units_needing_transfer, now
+            )
 
     def create_transfer(
         self,
         coalition: Coalition,
         source: ControlPoint,
         units: dict[GroundUnitType, int],
+        now: datetime,
     ) -> None:
-        coalition.transfers.new_transfer(TransferOrder(source, self.destination, units))
+        coalition.transfers.new_transfer(
+            TransferOrder(source, self.destination, units), now
+        )
 
     def find_ground_unit_source(self, game: Game) -> Optional[ControlPoint]:
         # This is running *after* the turn counter has been incremented, so this is the