refactor(server): indexer & worker & sync perf (#15504)

.docker/selfhost/config.json.example

@@ -10,5 +10,9 @@
       "enabled": true,
       "allowCustomEndpoint": true
     }
+  },
+  "indexer": {
+    "enabled": true,
+    "provider.type": "embedded"
   }
-}
+}