fix: propagate isUpgrade flag from Upgrade to Install for CLI path

Install::action() hardcoded isUpgrade=false, so the CLI upgrade path
never rewrote compose/env files. Added a protected property that
Upgrade sets before calling parent::action().

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

src/Appwrite/Platform/Tasks/Install.php

@@ -33,6 +33,7 @@ class Install extends Action
     private const string APPWRITE_API_URL = 'http://appwrite';
     private const string GROWTH_API_URL = 'https://growth.appwrite.io/v1';
 
+    protected bool $isUpgrade = false;
     protected string $hostPath = '';
     protected ?bool $isLocalInstall = null;
     protected ?array $installerConfig = null;
@@ -66,7 +67,7 @@ class Install extends Action
         bool $noStart,
         string $database
     ): void {
-        $isUpgrade = false;
+        $isUpgrade = $this->isUpgrade;
         $defaultHttpPort = '80';
         $defaultHttpsPort = '443';
         $config = Config::getParam('variables');

src/Appwrite/Platform/Tasks/Upgrade.php

@@ -42,6 +42,7 @@ class Upgrade extends Install
         bool $noStart,
         string $database
     ): void {
+        $this->isUpgrade = true;
         $isLocalInstall = $this->isLocalInstall();
         $this->applyLocalPaths($isLocalInstall, true);