fix(robot-server): initialize fw update status_cache so we dont hang …

…on bootup when client queries fw updates. (#15049)

robot-server/robot_server/subsystems/firmware_update_manager.py

@@ -139,12 +139,13 @@ def __init__(
         created_at: datetime,
         update_id: str,
         complete_callback: Callable[[], Awaitable[None]],
+        status_cache: Optional[UpdateProgress] = None,
     ) -> None:
         """Build an _UpdateProcess. Should only be done by the manager."""
         self._status_queue = Queue()
         self._hw_handle = hw_handle
         self._subsystem = subsystem
-        self._status_cache = None
+        self._status_cache = status_cache
         self._status_cache_lock = Lock()
         self._created_at = created_at
         self._update_id = update_id
@@ -346,7 +347,12 @@ async def _complete() -> None:
                     log.exception(f"Double pop for update on {subsystem}")
 
         self._all_updates_by_id[update_id] = _UpdateProcess(
-            self._hardware_handle, hw_subsystem, creation_time, update_id, _complete
+            self._hardware_handle,
+            hw_subsystem,
+            creation_time,
+            update_id,
+            _complete,
+            UpdateProgress(UpdateState.queued, 0, None),
         )
         self._running_updates_by_subsystem[hw_subsystem] = self._all_updates_by_id[
             update_id