feat(accounting): document colleague trades on configured accounts

Post Montzar-covered buy/sell to Zarin/Tahesab/Pargar using montzar_account_* settings, and harden public storage URL/MIME handling for uploads.

Co-authored-by: Cursor <cursoragent@cursor.com>

app/Services/PargarSyncService.php

@@ -555,6 +555,31 @@ class PargarSyncService
                 continue;
             }
 
+            if (str_ends_with(strtoupper($id), '-C')) {
+                $baseId = (int) substr($id, 0, -2);
+                if ($baseId <= 0) {
+                    continue;
+                }
+
+                $log = PargarSyncLog::query()
+                    ->where('order_id', $baseId)
+                    ->where('type', self::TYPE_ORDER)
+                    ->where('sync_status', self::STATUS_PENDING)
+                    ->where('data', 'like', '%"colleague_leg":true%')
+                    ->latest('id')
+                    ->first();
+
+                if ($log) {
+                    $this->markSuccess($log, $id, ['OrderId' => $id]);
+                    if ($log->customer_id) {
+                        $customerIds[(int) $log->customer_id] = true;
+                    }
+                    $confirmed++;
+                }
+
+                continue;
+            }
+
             $order = Order::find($id);
             if (! $order) {
                 continue;
@@ -563,7 +588,13 @@ class PargarSyncService
             $order->pargar_confirmed_at = now();
             $order->save();
 
-            $log = PargarSyncLog::where('order_id', $order->id)->latest('id')->first();
+            $log = PargarSyncLog::where('order_id', $order->id)
+                ->where(function ($q) {
+                    $q->whereNull('data')
+                        ->orWhere('data', 'not like', '%"colleague_leg":true%');
+                })
+                ->latest('id')
+                ->first();
             if ($log) {
                 $this->markSuccess($log, (string) $order->id, ['OrderId' => (string) $order->id]);
             }