update rails to 8.1.2

lib/pdfium.rb

@@ -364,9 +364,7 @@ class Pdfium
       @closed
     end
 
-    def form_handle
-      @document.form_handle
-    end
+    delegate :form_handle, to: :@document
 
     def ensure_not_closed!
       raise PdfiumError, 'Page is closed.' if closed?

lib/submissions/generate_result_attachments.rb

@@ -238,7 +238,7 @@ module Submissions
           width = page.box.width
           height = page.box.height
 
-          preferences_font_size = field.dig('preferences', 'font_size').then { |num| num.present? ? num.to_i : nil }
+          preferences_font_size = field.dig('preferences', 'font_size').then { |num| num.presence&.to_i }
 
           font_size   = preferences_font_size
           font_size ||= (([page.box.width, page.box.height].min / A4_SIZE[0].to_f) * FONT_SIZE).to_i

lib/submissions/timestamp_handler.rb

@@ -35,7 +35,7 @@ module Submissions
       conn = Faraday.new(uri.origin) do |c|
         c.options.read_timeout = TIMEOUT
         c.options.open_timeout = TIMEOUT
-        c.basic_auth(uri.user, uri.password) if uri.password.present?
+        c.request :authorization, :basic, uri.user, uri.password if uri.password.present?
       end
 
       response = conn.post(uri.request_uri, build_payload(digest.digest),