arcrun — AI workflow execution engine (clean history)

Self-hosted 開源：WASM 零件 + recipe + cypher-executor，跑在你自己的 Cloudflare。

此為重建的乾淨歷史起點（移除曾誤 commit 的 GCP SA 金鑰，舊歷史保留在
richblack/arcrun 與本地 backup 分支）。含：
- acr init --self-hosted installer（建 KV/R2 + codeload 拉預編譯 wasm + wrangler deploy + seed recipe）
- recipe push 把關（資料外流提醒 + 打通檢查）
- 19 個正當零件預編譯 wasm（claude_api/km_writer/kbdb_upsert_block 排除：違反 DECISIONS §1）
- CLI / cypher-executor / registry / 完整 SDD

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

builtins/src/actions/initComponents.ts

@@ -0,0 +1,43 @@
+// initComponents：把所有內建零件上架到 Component Registry（via Service Binding）
+import type { Bindings } from '../types';
+import { buildComponentDefs } from '../types';
+
+async function publishOne(
+  registry: Fetcher,
+  def: ReturnType<typeof buildComponentDefs>[number],
+): Promise<{ id: string; status: number; ok: boolean; error?: unknown }> {
+  const payload = {
+    id: def.id,
+    name: def.name,
+    description: def.description,
+    url: def.url,
+    method: def.method,
+    tags: def.tags,
+    input_schema: JSON.stringify(def.input_schema),
+    output_schema: JSON.stringify(def.output_schema),
+    author: 'u6u-builtins',
+    version: '1.0.0',
+  };
+
+  const res = await registry.fetch('http://registry/components', {
+    method: 'POST',
+    headers: { 'Content-Type': 'application/json' },
+    body: JSON.stringify(payload),
+  });
+
+  const body = await res.json().catch(() => ({ error: 'parse error' }));
+  // 201 = 新建成功；409 = 已存在（也算 ok）
+  const isOk = res.status === 201 || res.status === 409 || res.ok;
+  return { id: def.id, status: res.status, ok: isOk, ...(!isOk && { error: body }) };
+}
+
+export async function initComponents(
+  env: Bindings,
+): Promise<{ ok: number; failed: number; results: unknown[] }> {
+  const defs = buildComponentDefs(env.WORKER_BASE_URL);
+  const results = await Promise.all(defs.map(def => publishOne(env.REGISTRY, def)));
+
+  const ok = results.filter(r => r.ok).length;
+  const failed = results.filter(r => !r.ok).length;
+  return { ok, failed, results };
+}