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>

registry/src/routes/query.ts

@@ -0,0 +1,43 @@
+// GET /components/:id — 取得零件最優版本合約
+// GET /components/:id/versions — 取得所有版本清單（含評分）
+// GET /components/search?q=... — 語意搜尋零件
+// Requirements: 12.2, 12.3
+
+import { Hono } from 'hono';
+import type { Bindings } from '../types';
+import { getComponent, getComponentVersions, searchComponents } from '../actions/queryComponents';
+
+const app = new Hono<{ Bindings: Bindings }>();
+
+// 語意搜尋（必須在 /:id 之前，避免 "search" 被當作 id）
+app.get('/search', async c => {
+  const q = c.req.query('q');
+  if (!q || q.trim() === '') {
+    return c.json({ success: false, error: 'q 參數必填' }, 400);
+  }
+
+  const results = await searchComponents(q.trim(), c.env);
+  return c.json({ success: true, data: { results, count: results.length } });
+});
+
+// 取得所有版本
+app.get('/:id/versions', async c => {
+  const id = c.req.param('id');
+  const versions = await getComponentVersions(id, c.env);
+  if (versions.length === 0) {
+    return c.json({ success: false, error: `零件 ${id} 不存在` }, 404);
+  }
+  return c.json({ success: true, data: { versions, count: versions.length } });
+});
+
+// 取得最優版本
+app.get('/:id', async c => {
+  const id = c.req.param('id');
+  const component = await getComponent(id, c.env);
+  if (!component) {
+    return c.json({ success: false, error: `零件 ${id} 不存在` }, 404);
+  }
+  return c.json({ success: true, data: component });
+});
+
+export default app;