Add notes reminding to update places after updating updates

crates/teloxide-core/src/types/update.rs

@@ -62,6 +62,12 @@ impl Update {
 
 #[derive(Clone, Debug, PartialEq)]
 pub enum UpdateKind {
+    // NB: When adding new variants, don't forget to update
+    //     - `AllowedUpdate`
+    //     - `Update::user`
+    //     - `Update::chat`
+    //     - `DpHandlerDescription::full_set`
+    //     - `dispatching/filter_ext.rs`
     /// New incoming message of any kind — text, photo, sticker, etc.
     Message(Message),
 

crates/teloxide/src/dispatching/handler_description.rs

@@ -50,6 +50,16 @@ impl EventKind for Kind {
     fn full_set() -> HashSet<Self> {
         use AllowedUpdate::*;
 
+        // NB: We need to specify all update kinds by hand, because telegram doesn't
+        //     enable `ChatMember` by default:
+        //
+        //     > A JSON-serialized list of the update types you want your bot to
+        //     > receive. For example, specify [“message”, “edited_channel_post”,
+        //     > “callback_query”] to only receive updates of these types. See Update
+        //     > for a complete list of available update types. Specify an empty list
+        //     > to receive all update types except chat_member (default). If not
+        //     > specified, the previous setting will be used.
+
         [
             Message,
             EditedMessage,