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/comment-added.event-handler.ts

@@ -33,6 +33,13 @@ export class CommentAddedEventHandler
       decision: false,
       decidedBy: null,
       decidedAt: null,
+      poll: comment.poll?.length
+        ? {
+            options: comment.poll.map((text) => ({ text, voters: [] })),
+            closed: false,
+            winner: null,
+          }
+        : null,
       resolved: false,
       resolvedBy: null,
       resolvedAt: null,