feat: remove Google Vertex AI provider support

apps/cli/src/docker.ts

@@ -236,7 +236,6 @@ export interface WorkerOptions {
   containerName: string;
   envFlags: string[];
   config?: { hostPath: string; containerPath: string };
-  credentials?: string;
   promptsDir?: string;
   outputDir?: string;
   workspace: string;
@@ -291,11 +290,6 @@ export function spawnWorker(opts: WorkerOptions): ChildProcess {
     args.push('-v', `${opts.outputDir}:/app/output`);
   }
 
-  // Mount credentials file to fixed container path
-  if (opts.credentials) {
-    args.push('-v', `${opts.credentials}:/app/credentials/google-sa-key.json:ro`);
-  }
-
   // Environment
   args.push(...opts.envFlags);