add safety checks for worker updates

src/backend/src/services/worker/WorkerService.js

@@ -93,6 +93,8 @@ class WorkerService extends BaseService {
         svc_event.on('fs.write.file', async (_key, data, meta) => {
             // Code should only run on the same server as the write
             if ( meta.from_outside ) return;
+            // There seems to be some bug in file writes where uid is null. We will check for this
+            if ( !data.node.uid || data.node.uid === '' ) return;
 
             // Check if the file that was written correlates to a worker
             const results = await svc_su.sudo(async () => {
@@ -107,9 +109,14 @@ class WorkerService extends BaseService {
                 // Person who just wrote file (not necessarily file owner)
                 const actor = Context.get('actor');
 
+                const /** @type {string} */ workerFullName  = (await result.get('subdomain'));
+                if ( ! workerFullName.startsWith('workers.puter.') ) {
+                    continue;
+                }
+
                 // Worker data
                 const fileData = (await readPuterFile(Context.get('actor'), data.node.path)).toString();
-                const workerName = (await result.get('subdomain')).split('.').pop();
+                const workerName = workerFullName.split('.').pop();
 
                 // Get appropriate deploy time auth token to give to the worker
                 let authToken;