chore: Add Redis/APCu extensions to CI and update gitignore

- Add redis and apcu PHP extensions to release workflow for v0.4.0 storage support
- Add MARKETING.md to gitignore

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

.gitea/workflows/release.yml

@@ -18,7 +18,7 @@ jobs:
         uses: shivammathur/setup-php@v2
         with:
           php-version: '8.3'
-          extensions: mbstring, xml, zip, intl, gettext
+          extensions: mbstring, xml, zip, intl, gettext, redis, apcu
           tools: composer:v2
 
       - name: Get version from tag

.gitignore

@@ -4,3 +4,6 @@ wp-plugins
 wp-core
 vendor/
 releases/*
+
+# Marketing texts (not for distribution)
+MARKETING.md