fix: Change StatusView precision type to int | None (#1438)

Fixes #124 Changed 3 to None

Author: shree-iyengar-dls

src/blueapi/worker/event.py

@@ -113,8 +113,8 @@ class StatusView(BlueapiBaseModel):
         description="Target value operation of progress, if known", default=None
     )
     unit: str = Field(description="Units of progress", default="units")
-    precision: int = Field(
-        description="Sensible precision of progress to display", default=3
+    precision: int | None = Field(
+        description="Sensible precision of progress to display", default=None
     )
     done: bool = Field(
         description="Whether the operation this status describes is complete",

src/blueapi/worker/task_worker.py

@@ -656,7 +656,7 @@ def _on_status_event(
             initial=initial,
             target=target,
             unit=unit or "units",
-            precision=precision or 3,
+            precision=precision,
             done=status.done,
             percentage=percentage,
             time_elapsed=time_elapsed,