Exclude channel notes from featured polls (#13838)

* feat(backend): add `channelId` to `MiPoll` as a Denormalized field

* feat(backend): option to exclude polls in channels

* chore: exclude channel notes from featured polls

* docs(changelog): みつけるのアンケート欄にてチャンネルのアンケートが含まれてしまう問題を修正

* fix: missing license header

packages/misskey-js/src/autogen/types.ts

@@ -21019,6 +21019,8 @@ export type operations = {
           limit?: number;
           /** @default 0 */
           offset?: number;
+          /** @default false */
+          excludeChannels?: boolean;
         };
       };
     };