Properly await for AddInclusionBounds

Without this, the function call will never actually run. I'm not sure if
this was working anyways because of some obscure implementation detail
in grpcio, but in normal python a not awaited async function should
never actually run.

Besides this, for sure errors can't be really caught without the await
either.

This was detected while migrating to betterproto, as betterproto has
correct type hints.

Signed-off-by: Leandro Lucarella <[email protected]>

Author: llucax

src/frequenz/client/microgrid/_client.py

@@ -32,6 +32,7 @@
 from frequenz.channels import Receiver
 from frequenz.client.base import retry, streaming
 from google.protobuf.empty_pb2 import Empty  # pylint: disable=no-name-in-module
+from google.protobuf.timestamp_pb2 import Timestamp  # pylint: disable=no-name-in-module
 
 from ._component import (
     Component,
@@ -469,11 +470,14 @@ async def set_bounds(
 
         target_metric = PbSetBoundsParam.TargetMetric.TARGET_METRIC_POWER_ACTIVE
         try:
-            self.api.AddInclusionBounds(
-                PbSetBoundsParam(
-                    component_id=component_id,
-                    target_metric=target_metric,
-                    bounds=PbBounds(lower=lower, upper=upper),
+            await cast(
+                Awaitable[Timestamp],
+                self.api.AddInclusionBounds(
+                    PbSetBoundsParam(
+                        component_id=component_id,
+                        target_metric=target_metric,
+                        bounds=PbBounds(lower=lower, upper=upper),
+                    ),
                 ),
             )
         except grpc.aio.AioRpcError as err: