feat: federation for bots

Author: sowelipililimute

stable/sync/v1/sync.proto

@@ -39,7 +39,8 @@ message Event {
     uint64 user_id = 1;
     // User ID of the user that invited.
     uint64 inviter_id = 2;
-    // The invite for the guild.
+    // The unique identifier of a user's invite to another
+    // user to join a given guild.
     string invite_id = 3;
   }
   // Event sent when a user rejects a guild invitation.

staging/bots/v1/bots.proto

@@ -118,6 +118,9 @@ service BotsService {
   // may display in its UI or restrict actions to prevent
   // request errors
   rpc Policies(PoliciesRequest) returns (PoliciesResponse);
-  // The request to add a bot.
+  // Requests a bot to add itself to the guild.
+  //
+  // For cross-server bots, this dispatches a UserInvited
+  // request across sync, inviting the bot to the guild.
   rpc AddBot(AddBotRequest) returns (AddBotResponse);
 };