chore: Sentry issues (#4623)

Fixes various issues reported on sentry

- Twilio channel creation validation errors
- Room Channel error with nil class
- Webhook Uri exception

app/controllers/api/v1/accounts/channels/twilio_channels_controller.rb

@@ -7,7 +7,6 @@ class Api::V1::Accounts::Channels::TwilioChannelsController < Api::V1::Accounts:
       build_inbox
       setup_webhooks if @twilio_channel.sms?
     rescue StandardError => e
-      Sentry.capture_exception(e)
       render_could_not_create_error(e.message)
     end
   end

app/controllers/api/v1/accounts/conversations/base_controller.rb

@@ -5,7 +5,7 @@ class Api::V1::Accounts::Conversations::BaseController < Api::V1::Accounts::Base
   private
 
   def conversation
-    @conversation ||= Current.account.conversations.find_by(display_id: params[:conversation_id])
+    @conversation ||= Current.account.conversations.find_by!(display_id: params[:conversation_id])
     authorize @conversation.inbox, :show?
   end
 end