Add locks to rebuilds

server/routers/olm/handleOlmRegisterMessage.ts

@@ -21,6 +21,7 @@ import { build } from "@server/build";
 import { canCompress } from "@server/lib/clientVersionChecks";
 import config from "@server/lib/config";
 import cache from "#dynamic/lib/cache"; // not using regional here because we need this in the register message handler before we know where the client is
+import { waitForClientRebuildIdle } from "@server/lib/rebuildClientAssociations";
 
 const HOLEPUNCH_STALE_CHAIN_THRESHOLD = 18;
 const HOLEPUNCH_STALE_CHAIN_TTL_SECONDS = 1800;
@@ -385,6 +386,8 @@ export const handleOlmRegisterMessage: MessageHandler = async (context) => {
     }
 
     // NOTE: its important that the client here is the old client and the public key is the new key
+    await waitForClientRebuildIdle(olm.clientId);
+
     const siteConfigurations = await buildSiteConfigurationForOlmClient(
         client,
         publicKey,