feat: add /register endpoint + fix acr run Mode 1 (inline YAML execution)

- POST /register on cypher.arcrun.dev: HMAC-SHA256(email, ENCRYPTION_KEY) → ak_{32hex}, no DB needed
- acr run: Mode 1 (standard/local) now finds local YAML and POSTs to /cypher/execute inline
- acr init: fix register URL → cypher.arcrun.dev/register; fix local mode description
- acr init --local: creates hello.yaml example workflow
- cli v1.0.3 published

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

cli/src/commands/init.ts

@@ -9,7 +9,7 @@ import { join } from 'node:path';
 import chalk from 'chalk';
 import { saveConfig, type ArcrunConfig } from '../lib/config.js';
 
-const ARCRUN_REGISTER_URL = 'https://api.arcrun.dev/register';
+const ARCRUN_REGISTER_URL = 'https://cypher.arcrun.dev/register';
 
 async function prompt(rl: ReturnType<typeof createInterface>, question: string): Promise<string> {
   const answer = await rl.question(chalk.cyan(`? ${question}: `));
@@ -35,21 +35,22 @@ export async function cmdInit(options: { local?: boolean; selfHosted?: boolean }
 }
 
 async function initLocal(): Promise<void> {
-  console.log(chalk.gray('  Local 模式：不需要 Cloudflare 帳號，直接在本機跑 workflow\n'));
+  console.log(chalk.gray('  Local 模式：不需要 Cloudflare 帳號，workflow 由 arcrun.dev 雲端引擎執行\n'));
 
   const config: ArcrunConfig = {
     mode: 'local',
   };
 
   saveConfig(config);
-  createCredentialsYamlIfMissing();
+  createHelloYamlIfMissing();
 
-  console.log(chalk.green('\n  ✓ 設定完成 → ~/.arcrun/config.yaml（local 模式）\n'));
+  console.log(chalk.green('\n  ✓ 設定完成 → ~/.arcrun/config.yaml（local 模式）'));
+  console.log(chalk.green('  ✓ 建立 hello.yaml 範例 workflow\n'));
   console.log('  你可以立刻開始：');
-  console.log(chalk.cyan('    acr validate workflow.yaml --offline') + '  # 驗證 workflow 格式');
-  console.log(chalk.cyan('    acr run <workflow_name>') + '              # 本機執行\n');
-  console.log(chalk.gray('  Local 模式不連線 arcrun.dev，所有 workflow 在本機執行。'));
-  console.log(chalk.gray('  需要 Cloudflare 部署？執行 acr init（Standard 模式）。\n'));
+  console.log(chalk.cyan('    acr validate hello.yaml --offline') + '   # 驗證 workflow 格式');
+  console.log(chalk.cyan('    acr run hello') + '                        # 執行 hello workflow\n');
+  console.log(chalk.gray('  Local 模式：YAML 留在本機，workflow 由 arcrun.dev 引擎執行。'));
+  console.log(chalk.gray('  需要用自己的 CF 帳號存放 credentials？執行 acr init（Standard 模式）。\n'));
 }
 
 async function initStandard(rl: ReturnType<typeof createInterface>): Promise<void> {
@@ -79,7 +80,7 @@ async function initStandard(rl: ReturnType<typeof createInterface>): Promise<voi
       throw new Error(`API Key 取得失敗（${res.status}）：${err}`);
     }
 
-    const data = await res.json() as { api_key: string; tenant_id: string };
+    const data = await res.json() as { api_key: string };
     apiKey = data.api_key;
     console.log(chalk.green(' ✓'));
   } catch (e) {
@@ -140,6 +141,29 @@ async function initSelfHosted(rl: ReturnType<typeof createInterface>): Promise<v
   console.log(chalk.green('  ✓ 建立 credentials.yaml\n'));
 }
 
+function createHelloYamlIfMissing(): void {
+  const helloPath = join(process.cwd(), 'hello.yaml');
+  if (!existsSync(helloPath)) {
+    writeFileSync(helloPath,
+      '# arcrun hello world workflow\n' +
+      '# 執行：acr run hello\n\n' +
+      'name: hello\n' +
+      'description: "Hello world — 示範如何讓 AI 處理訊息後傳送通知"\n\n' +
+      'flow:\n' +
+      '  - "input >> ON_SUCCESS >> ai_reply"\n' +
+      '  - "ai_reply >> ON_SUCCESS >> log_output"\n\n' +
+      'config:\n' +
+      '  ai_reply:\n' +
+      '    component: "component://cmp_openai_chat"\n' +
+      '    model: "gpt-4o-mini"\n' +
+      '    prompt: "請用繁體中文說 Hello World，並解釋 arcrun 是什麼"\n' +
+      '  log_output:\n' +
+      '    component: "component://cmp_log_stdout"\n',
+      'utf8'
+    );
+  }
+}
+
 function createCredentialsYamlIfMissing(): void {
   const credPath = join(process.cwd(), 'credentials.yaml');
   if (!existsSync(credPath)) {