Unify Harbor error handling across server and client

src/server/dataplaneClient.js

@@ -1,4 +1,5 @@
 import http from 'node:http';
+import { HarborError } from '../shared/errors.js';
 
 function request(socketPath, pathname, method = 'GET') {
   return new Promise((resolve, reject) => {
@@ -27,8 +28,15 @@ function request(socketPath, pathname, method = 'GET') {
 export function createDataplaneClient(socketPath, send = request) {
   let current = { running: false, startedAt: null };
   const update = async (pathname, method) => {
-    current = await send(socketPath, pathname, method);
-    return current;
+    try {
+      current = await send(socketPath, pathname, method);
+      return current;
+    } catch (cause) {
+      if (pathname === '/apply' || pathname === '/restart') {
+        throw new HarborError('PROCESS_START_FAILED', { cause });
+      }
+      throw cause;
+    }
   };
 
   return {