fix(repository): fix on fastcount method

Double apply2Query in getFastCount — $filter->apply2Query() was called twice
on the same filter object. The first call mutates filter values (epoch → date string),
so the second call tries
new DateTime("@2026-04-28 22:00:00") which fails. Removed the duplicate call.

Missing c alias for selection_status filter , The requiredAliases() method didn't
include the category join (c) when selection_status was active, but the filter's DQL references
c.session_count / c.lightning_count. Added $need['c'] = true.

Author: smarcet

app/Repositories/Summit/DoctrineSummitEventRepository.php

@@ -541,7 +541,7 @@ private function requiredAliases(?Filter $filter, ?Order $order): array
             $need['av'] = true;
 
         if($has("selection_status") || $ord('selection_status')){
-            $need['selp'] = $need['ssp'] = $need['sspl'] = true;
+            $need['selp'] = $need['ssp'] = $need['sspl'] = $need['c'] = true;
         }
 
         if($has('track_chairs_status'))
@@ -617,10 +617,6 @@ public function getFastCount(Filter $filter = null, Order $order = null){
 
         $query = $this->applyExtraJoins($query, $filter, $order);
 
-        if(!is_null($filter)){
-            $filter->apply2Query($query, $this->getFilterMappings($filter));
-        }
-
         if (!is_null($filter)) {
             $filter->apply2Query($query, $this->getFilterMappings($filter));