devops: fix flakiness dashboard for projects with no metadata (#12426)

utils/flakiness-dashboard/README.md

@@ -2,3 +2,8 @@
 
 This directory contains source code for the Azure function that we use to aggregate test reports.
 The data is consumed by https://devops.aslushnikov.com/flakiness2.html
+
+To publish function:
+- install [Azure Functions Core Tools version 3.x.](https://docs.microsoft.com/en-us/azure/azure-functions/functions-run-local?tabs=v4%2Cmacos%2Ccsharp%2Cportal%2Cbash#v2).
+- install Azure CLI && login via `az login`
+- run `func azure functionapp publish folio-flakiness-dashboard --javascript`

utils/flakiness-dashboard/processing/dashboard_compressed_v1.js

@@ -36,6 +36,7 @@ function compressReports(reports) {
     const projectNameToMetadata = new Map();
     if (report.config && report.config.projects) {
       for (const project of report.config.projects) {
+        project.metadata = project.metadata || {};
         if (project.metadata.headful === false)
           delete project.metadata.headful;
         if (project.metadata.mode === 'default')