Add diagnostics for VAOS modality error (#20243)

* Add diagnostics for VAOS modality error

* Fix lint

modules/vaos/app/services/vaos/v2/appointments_service.rb

@@ -774,11 +774,27 @@ def set_modality(appointment)
           modality = 'communityCare'
         end
 
-        Rails.logger.info("VAOS appointment id #{appointment[:id]} modality cannot be determined.") if modality.nil?
-
+        log_modality_failure(appointment) if modality.nil?
         appointment[:modality] = modality
       end
 
+      def log_modality_failure(appointment)
+        Rails.logger.info("VAOS appointment id #{appointment[:id]} modality cannot be determined.")
+        if Random.new.rand(10).zero?
+          Rails.logger.info(
+            "VAOS appointment id #{appointment[:id]} modality details.",
+            {
+              service_type: appointment[:service_type],
+              service_category_text: appointment.dig(:service_category, 0, :text),
+              kind: appointment[:kind],
+              atlas: appointment.dig(:telehealth, :atlas),
+              vvs_kind: appointment.dig(:telehealth, :vvs_kind),
+              gfe: appointment.dig(:extension, :patient_has_mobile_gfe)
+            }.to_json
+          )
+        end
+      end
+
       def telehealth_modality(appointment)
         if !appointment.dig(:telehealth, :atlas).nil?
           'vaVideoCareAtAnAtlasLocation'