wired PICK SKY server-side polarity countdown via threading.Timer (tasks.py); fixed polarity_done overlay gating on refresh; cleared sig-select floats on overlay dismiss; filtered Redact events from Most Recent applet

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

src/templates/apps/gameboard/_partials/_sig_select_overlay.html

@@ -8,6 +8,9 @@ Context: sig_cards, user_polarity, user_seat, sig_reserve_url, sig_reservations_
      data-polarity="{{ user_polarity }}"
      data-user-role="{{ user_seat.role }}"
      data-reserve-url="{{ sig_reserve_url }}"
+     data-ready-url="{% url 'epic:sig_ready' room.id %}"
+
+     data-ready="{{ user_ready|yesno:'true,false' }}"
      data-reservations="{{ sig_reservations_json }}">
 
     <div class="sig-modal">