Improve cache handling with on-demand cache warm-up and increase cURL timeout

- Implement on-demand warming of manual and automatic flags cache in `invoice_period_flag_service` to handle cache misses effectively.
- Extend cURL timeout in `economic_endpoint_t` for improved reliability in network requests.

services/nginx/app/classes/invoice_period_flag_service.php

@@ -384,11 +384,20 @@ class invoice_period_flag_service
         try {
             $flags = (new redis())->get_invoice_period_manual_flags();
         } catch (Throwable) {
-            return [];
+            $flags = null;
         }
 
         if (!is_array($flags)) {
-            return [];
+            // Cache miss — warm on demand and re-fetch
+            $this->warmManualFlagsCache();
+            try {
+                $flags = (new redis())->get_invoice_period_manual_flags();
+            } catch (Throwable) {
+                return [];
+            }
+            if (!is_array($flags)) {
+                return [];
+            }
         }
 
         return array_values(array_filter($flags, static function ($flag): bool {
@@ -516,11 +525,20 @@ class invoice_period_flag_service
         try {
             $flags = (new redis())->get_invoice_period_automatic_flags($dateFrom, $dateTo);
         } catch (Throwable) {
-            return [];
+            $flags = null;
         }
 
         if (!is_array($flags)) {
-            return [];
+            // Cache miss — warm on demand and re-fetch
+            $this->warmAutomaticFlagsForPeriod($dateFrom, $dateTo);
+            try {
+                $flags = (new redis())->get_invoice_period_automatic_flags($dateFrom, $dateTo);
+            } catch (Throwable) {
+                return [];
+            }
+            if (!is_array($flags)) {
+                return [];
+            }
         }
 
         if ($onlyCustomerNumbers === null) {
@@ -592,11 +610,16 @@ class invoice_period_flag_service
         try {
             $rows = (new redis())->get_invoice_period_order_item_rows($dateFrom, $dateTo);
         } catch (Throwable) {
-            return [];
+            $rows = null;
         }
 
         if (!is_array($rows)) {
-            return [];
+            // Cache miss — fetch from DB and cache for next request
+            $rows = $this->fetchOrderItemRowsFromDb($dateFrom, $dateTo);
+            try {
+                (new redis())->cache_invoice_period_order_item_rows($dateFrom, $dateTo, $rows);
+            } catch (Throwable) {
+            }
         }
 
         $this->seedOrderItemsPreviewCacheFromRows($rows);

services/nginx/app/traits/economic_endpoint_t.php

@@ -148,7 +148,7 @@ trait economic_endpoint_t
             //CURLOPT_ENCODING => '',
             CURLOPT_MAXREDIRS => 10,
             CURLOPT_CONNECTTIMEOUT => 3,
-            CURLOPT_TIMEOUT => 10,
+            CURLOPT_TIMEOUT => 30,
             CURLOPT_FOLLOWLOCATION => true,
             CURLOPT_HTTP_VERSION => CURL_HTTP_VERSION_2TLS,
             CURLOPT_CUSTOMREQUEST => $method,