Add a required namespace field to PowerDistributingActor requests

This field be used to identify the channel for sending a response
into, in the channel registry.

Signed-off-by: Sahas Subramanian <[email protected]>

Author: shsms

src/frequenz/sdk/actor/power_distributing/request.py

@@ -12,6 +12,13 @@
 class Request:
     """Request to set power to the `PowerDistributingActor`."""
 
+    namespace: str
+    """The namespace of the request.
+
+    This will be used to identify the channel for sending the response into, in the
+    channel registry.
+    """
+
     power: float
     """The requested power in watts."""