Add option to manage redis or not

manifests/init.pp

@@ -122,6 +122,7 @@ class mastodon (
   String $github_token = '',
   Integer $media_retention_days = 7,
   Integer $cards_retention_days = 180,
+  Boolean $manage_redis = true,
 ) {
   case $ensure {
     default: {
@@ -192,7 +193,9 @@ class mastodon (
   }
   class { 'postgresql::server':
   }
-  include redis
+  if ($manage_redis) {
+    include redis
+  }
   exec { 'enable_corepack':
     command => '/usr/bin/corepack enable',
     creates => '/usr/bin/yarn',