feat: quick polls in comments that end in a decision

«📊 Añadir una encuesta» adds 2 to 6 options to a new comment. Members,
viewers too, vote by clicking an option (one vote each, which they can
change or take back) and see each option's votes as a bar. Whoever
started it, or an admin, closes it with «Cerrar y decidir»: the most
voted wins (none on a tie) and a «Decidido: …» reply marked as a
decision shows above the ticket. Events of the comment (voted, closed).

API: addComment(…, poll), votePoll, closePoll, Comment.poll;
POST /api/comments/{id}/poll/vote and …/poll/close. MCP: add_comment
poll, vote_poll, close_poll.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

libs/api/tracker/application/src/lib/event-handlers/event-handlers.ts

@@ -6,6 +6,7 @@ import { CommentReactedEventHandler } from './comment-reacted.event-handler';
 import { CommentDecisionMarkedEventHandler } from './comment-decision-marked.event-handler';
 import { CommentThreadResolvedEventHandler } from './comment-thread-resolved.event-handler';
 import { IssueReviewsEventHandler } from './issue-reviews.event-handler';
+import { CommentPollEventHandler } from './comment-poll.event-handler';
 import { IssueVotedEventHandler } from './issue-voted.event-handler';
 import { IssueAssignedEventHandler } from './issue-assigned.event-handler';
 import { IssueCreatedEventHandler } from './issue-created.event-handler';
@@ -56,6 +57,7 @@ export const EVENT_HANDLERS = [
   CommentDecisionMarkedEventHandler,
   CommentThreadResolvedEventHandler,
   IssueReviewsEventHandler,
+  CommentPollEventHandler,
   IssueVotedEventHandler,
   IssueAssignedEventHandler,
   IssueCreatedEventHandler,