Enhance release ended notification for cross platform releases

- add platform specific versions to notify of version drift, if any

app/libs/notifiers/slack/renderers/release_ended.rb

@@ -9,6 +9,26 @@ def total_run_time
         return "N/A" if @release_completed_at.blank? || @release_started_at.blank?
         distance_of_time_in_words(@release_started_at, @release_completed_at)
       end
+
+      def cross_platform?
+        @app_platform == App.platforms[:cross_platform]
+      end
+
+      def android_finished_text
+        if @final_android_release_version.present?
+          ":white_check_mark: The Android release finished with the final version of *#{@final_android_release_version}*"
+        else
+          ":large_yellow_circle: The Android release did not finish"
+        end
+      end
+
+      def ios_finished_text
+        if @final_ios_release_version.present?
+          ":white_check_mark: The iOS release finished with the final version of *#{@final_ios_release_version}*"
+        else
+          ":large_yellow_circle: The iOS release did not finish"
+        end
+      end
     end
   end
 end

app/models/release.rb

@@ -429,7 +429,9 @@ def notification_params
         release_version: release_version,
         is_release_unhealthy: unhealthy?,
         release_completed_at: completed_at,
-        release_started_at: scheduled_at
+        release_started_at: scheduled_at,
+        final_android_release_version: (android_release_platform_run.release_version if android_release_platform_run&.finished?),
+        final_ios_release_version: (ios_release_platform_run.release_version if ios_release_platform_run&.finished?)
       }
     )
   end

app/views/notifiers/slack/release_ended.json.erb

@@ -4,9 +4,25 @@
       "type": "section",
       "text": {
         "type": "mrkdwn",
-        "text": "*Release <%= @release_version %>* is complete! :confetti_ball:"
+        "text": "Release *<%= @release_version %>* is complete! :confetti_ball:"
       }
     },
+    <% if cross_platform? %>
+    {
+      "type": "context",
+      "elements": [{
+        "type": "mrkdwn",
+        "text": "<%= android_finished_text %>"
+      }]
+    },
+    {
+      "type": "context",
+      "elements": [{
+        "type": "mrkdwn",
+        "text": "<%= ios_finished_text %>"
+      }]
+    },
+    <% end %>
     {
       "type": "section",
       "text": {