feat(search-indexer): Nested document resolution (#15949)

* Add explicit email and phone fields to team member content type

* Tag article with what children are below it

* Revert "Add explicit email and phone fields to team member content type"

This reverts commit 48c8ccc.

* Tag documents with their children ids

* Change nested resolution logic

* Also trigger a re-index on asset deletion

* Remove unnecessary variable

* Reverse conditional when removing duplicates

* Handle paginated responses from ES

* Move nested entry resolution logic into a method

* Change comment

* Add logs

* Update comment

* Add type hint to extractChildEntryIds function

* Chunk root entry fetches

* Add comment

* Paginate re-sync fetches

* Paginated fetching during initial sync

* Check for chunk size

* Add a way to override sync token

* Only get next sync token on non delta updates

* Change return

* Copy parameter

* Remove if check from indexing.service

---------

Co-authored-by: kodiakhq[bot] <49736102+kodiakhq[bot]@users.noreply.github.com>

libs/cms/src/lib/search/cmsSync.service.ts

@@ -159,6 +159,26 @@ export class CmsSyncService implements ContentSearchImporter<PostSyncOptions> {
     return hashResult.hash.toString()
   }
 
+  async getNextSyncToken(syncType: SyncOptions['syncType']) {
+    if (syncType === 'fromLast') {
+      return ''
+    }
+
+    let nextPageToken: string | undefined = ''
+    let nextSyncToken = ''
+
+    // We don't get the next sync token until we've reached the last page
+    while (!nextSyncToken) {
+      const response = await this.contentfulService.getSyncData({
+        initial: true,
+        nextPageToken,
+      })
+      nextPageToken = response.nextPageToken
+      nextSyncToken = response.nextSyncToken
+    }
+    return nextSyncToken
+  }
+
   // this is triggered from ES indexer service
   async doSync(
     options: SyncOptions,