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/LivePriceCacheService.php

@@ -2,7 +2,6 @@
 
 namespace App\Services;
 
-use App\Models\Price;
 use Illuminate\Support\Facades\Cache;
 
 class LivePriceCacheService
@@ -114,8 +113,7 @@ class LivePriceCacheService
     {
         $config = app(ConfigService::class);
         $display = app(ProductDisplayPriceService::class);
-        $last = Price::orderByDesc('id')->first();
-        $base = $last ? (float) $last->price : 0.0;
+        $base = (float) $display->resolveHistoricalBasePrice();
         $provider = $config->priceProvider();
 
         $montzarSource = 0;