Set long max-age to make assets more cacheable

Since these are keyed by their md5 hash we can cache them for a long time (I've chosen 7 days). R2 does add an etag, but the adding this will mean etags won't need to be checked and might enable cloudflare to do more caching.

Author: zetter-rpf

lib/scratch_asset_importer.rb

@@ -64,7 +64,8 @@ def save_to_editor_asset_bucket
       bucket: ENV.fetch('EDITOR_ASSETS_BUCKET'),
       key: asset_key,
       body:,
-      content_type: asset_content_type
+      content_type: asset_content_type,
+      cache_control: 'public, max-age=604800'
     )
   end
 

spec/lib/scratch_asset_importer_spec.rb

@@ -91,7 +91,8 @@
           bucket: 'test-bucket',
           key: 'internalapi/asset/123abc.png/get/',
           body: instance_of(StringIO),
-          content_type: 'image/png'
+          content_type: 'image/png',
+          cache_control: 'public, max-age=604800'
         )
       end