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>

cypher-executor/src/lib/schemas.ts

@@ -0,0 +1,26 @@
+import { z } from 'zod';
+
+// 圖定義的 Zod Schema
+export const graphSchema = z.object({
+  id: z.string().min(1),
+  name: z.string().min(1),
+  nodes: z.array(z.object({
+    id: z.string(),
+    type: z.enum(['Input', 'Component', 'Output']),
+    componentId: z.string().optional(),
+    label: z.string().optional(),
+    data: z.record(z.unknown()).optional(),
+  })),
+  edges: z.array(z.object({
+    from: z.string(),
+    to: z.string(),
+    type: z.enum(['PIPE', 'IF', 'FOREACH', 'CONTINUE', 'IS_A', 'ON_SUCCESS', 'ON_FAIL', 'ON_CLICK', 'CALLS_SUBFLOW', 'CONTAINS', 'HAS_STYLE', 'HAS_BEHAVIOR']),
+    condition: z.string().optional(),
+    iterator: z.string().optional(),
+  })),
+});
+
+export const executeSchema = z.object({
+  graph: graphSchema,
+  context: z.record(z.unknown()).default({}),
+});