chore: Use "create!" and "save!" bang methods when not checking the result (#5358)

* Use "create!" when not checking for errors on the result
* Use "save!" when not checking the result

app/services/sms/incoming_message_service.rb

@@ -6,7 +6,7 @@ class Sms::IncomingMessageService
   def perform
     set_contact
     set_conversation
-    @message = @conversation.messages.create(
+    @message = @conversation.messages.create!(
       content: params[:text],
       account_id: @inbox.account_id,
       inbox_id: @inbox.id,