SerializedComponentDiff::index_diff is optional (#29976)

there are some audit log documents where this field is missing. we could migrate them to have the field, but it's easier to accept that they might not exist and handle it. Should fix db-verifier and also dashboard for these instances.

GitOrigin-RevId: 5dbd45b2b4e620a14e3cc9c3b5939dd0cb1416d0

src/cli/lib/components.ts

@@ -419,7 +419,7 @@ function printDiff(
 
   // Print out index diffs for the root component.
   let rootDiff = componentDiffs[""];
-  if (rootDiff) {
+  if (rootDiff && rootDiff.indexDiff) {
     if (rootDiff.indexDiff.removed_indexes.length > 0) {
       let msg = `${opts.dryRun ? "Would delete" : "Deleted"} table indexes:\n`;
       for (let i = 0; i < rootDiff.indexDiff.removed_indexes.length; i++) {