Add rpcs for deleting and getting a single dispatch

Fixes #24

Signed-off-by: Stefan Brus <[email protected]>

Author: stefan-brus-frequenz

RELEASE_NOTES.md

@@ -7,3 +7,4 @@
   - The filter has additionally been re-designed, with fields that lack use cases being removed.
 - Removed the ability to update `microgrid_id` on an existing dispatch.
 - Removed the HTTP proxy gateway URLs, as these will not be used by the dispatch API.
+- Added RPCs for getting and deleting a single dispatch.

proto/frequenz/api/dispatch/dispatch.proto

@@ -28,6 +28,12 @@ service DispatchService {
 
   // Update a dispatch
   rpc UpdateDispatch(DispatchUpdateRequest) returns (google.protobuf.Empty);
+
+  // Get a single dispatch
+  rpc GetDispatch(DispatchGetRequest) returns (Dispatch);
+
+  // Delete a given dispatch
+  rpc DeleteDispatch(DispatchDeleteRequest) returns (google.protobuf.Empty);
 }
 
 // Message representing one dispatch
@@ -186,3 +192,15 @@ message DispatchUpdateRequest {
   // The dispatch payload
   google.protobuf.Struct payload = 7;
 }
+
+// Message to get a single dispatch by its ID
+message DispatchGetRequest {
+  // The dispatch identifier
+  uint64 id = 1;
+}
+
+// Message to delete a single dispatch by its ID
+message DispatchDeleteRequest {
+  // The dispatch identifier
+  uint64 id = 1;
+}