container: finance: fetch: prices: add User-Agent

CoinGecko now returns error 403 without a "descriptive" User-Agent

container/src/finance/lib/internal/fetch/prices/internal/base.php

@@ -2,7 +2,7 @@
 
 // docker-finance | modern accounting for the power-user
 //
-// Copyright (C) 2021-2025 Aaron Fiore (Founder, Evergreen Crypto LLC)
+// Copyright (C) 2021-2026 Aaron Fiore (Founder, Evergreen Crypto LLC)
 //
 // This program is free software: you can redistribute it and/or modify
 // it under the terms of the GNU General Public License as published by
@@ -154,6 +154,7 @@ namespace dfi\prices\internal
         protected function request_impl(string $url, array $header): mixed
         {
             $headers = array(
+              'User-Agent: docker-finance /' . $this->get_env()->get_env('API_VERSION'),
               'Accept: application/json',
               'Content-Type: application/json',
             );