fix(price): read last quote and daily extremes from the active provider

A stray montzar tick landed in the prices table, which stores no source, so
the database_last fallback served a ~168M quote on a shop whose Zaarbox board
was at ~217M. Last price and today's high/low now come from price_sync_logs
filtered by price_provider, the database fallback no longer counts as today's
price, and daily extremes reset when the provider changes.

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

app/Services/ProductDisplayPriceService.php

@@ -281,8 +281,19 @@ class ProductDisplayPriceService
         return $historical;
     }
 
+    /**
+     * آخرین قیمت پایهٔ ذخیره‌شده.
+     *
+     * اول تاریخچهٔ برچسب‌دار همین provider (price_sync_logs)؛ جدول prices منبع را
+     * ذخیره نمی‌کند و یک تیک اشتباه از provider دیگر «آخرین قیمت» را پرت می‌کند.
+     */
     public function resolveHistoricalBasePrice(): int
     {
+        $fromProviderLog = app(ConfigService::class)->lastProviderQuotePrice();
+        if ($fromProviderLog > 0) {
+            return $fromProviderLog;
+        }
+
         $last = Price::orderByDesc('id')->first();
         if (!$last || (float) $last->price <= 0) {
             return 0;
@@ -562,10 +573,7 @@ class ProductDisplayPriceService
         }
 
         if ($price <= 0 && $config->getBool('show_last_price', false)) {
-            $last = Price::orderByDesc('id')->first();
-            if ($last && (float) $last->price > 0) {
-                $price = (int) $last->price;
-            }
+            $price = $this->resolveHistoricalBasePrice();
         }
 
         $diffBuy = (int) $config->displayBuyPriceDiffRial();