Enable network timeline caching by default

config/instance.php

@@ -27,7 +27,7 @@ return [
 		],
 
 		'network' => [
-			'cached' => env('PF_NETWORK_TIMELINE') ? env('INSTANCE_NETWORK_TIMELINE_CACHED', false) : false,
+			'cached' => env('PF_NETWORK_TIMELINE') ? env('INSTANCE_NETWORK_TIMELINE_CACHED', true) : false,
 			'cache_dropoff' => env('INSTANCE_NETWORK_TIMELINE_CACHE_DROPOFF', 100),
 			'max_hours_old' => env('INSTANCE_NETWORK_TIMELINE_CACHE_MAX_HOUR_INGEST', 6)
 		]