Routes: Run 'before_all' handler in case of a 404

src/invidious/routes/errors.cr

@@ -1,5 +1,11 @@
 module Invidious::Routes::ErrorRoutes
   def self.error_404(env)
+    # Try to fetch user account/preferences and add CSP headers
+    begin
+      BeforeAll.handle(env)
+    rescue ex
+    end
+
     # Workaround for #3117
     if HOST_URL.empty? && env.request.path.starts_with?("/v1/storyboards/sb")
       return env.redirect "#{env.request.path[15..]}?#{env.params.query}"