fix(arch-scan): 修复多语言扫描器并添加 DELETE 清空表

- scanner.ts: 添加 DELETE 清空旧数据语句，避免重复插入
- ts-scanner: 改用 regex 替代 ts-morph 解析（避免解析失败）
- go-scanner/py-scanner/proto-scanner: 完善实现

scripts/arch-scan/scanners/proto-scanner.ts

@@ -1,10 +1,92 @@
-import type { Database as DBType } from 'better-sqlite3';
+import path from "node:path";
+import fs from "node:fs";
+import type { Database as DBType } from "better-sqlite3";
 
 interface ScanStats {
   contracts: number;
 }
 
+// Proto 符号正则
+const PROTO_SERVICE_RE = /^service\s+(\w+)\s*\{/gm;
+const PROTO_MESSAGE_RE = /^message\s+(\w+)\s*\{/gm;
+const PROTO_RPC_RE = /^\s*rpc\s+(\w+)\s*\(/gm;
+
 export function scanProtobuf(db: DBType, root: string): ScanStats {
-  // Protobuf 扫描器骨架：扫描 packages/shared-proto/proto/*.proto
-  return { contracts: 0 };
-}
+  const insertContract = db.prepare(
+    "INSERT OR IGNORE INTO contracts (name, type, file_path, service, content) VALUES (?, ?, ?, ?, ?)",
+  );
+
+  let contracts = 0;
+
+  // 扫描 packages/shared-proto/proto/*.proto
+  const protoDir = path.join(root, "packages", "shared-proto", "proto");
+  if (!fs.existsSync(protoDir)) return { contracts };
+
+  const entries = fs.readdirSync(protoDir, { withFileTypes: true });
+  for (const entry of entries) {
+    if (!entry.isFile() || !entry.name.endsWith(".proto")) continue;
+    const filePath = path.join(protoDir, entry.name);
+    const protoName = path.basename(entry.name, ".proto");
+    const serviceName = protoName.replace("_", "-");
+
+    let content: string;
+    try {
+      content = fs.readFileSync(filePath, "utf-8");
+    } catch {
+      continue;
+    }
+
+    // 提取 package 名
+    const pkgMatch = content.match(/^package\s+(\S+);/m);
+    const pkgName = pkgMatch ? pkgMatch[1] : "";
+
+    // 记录 proto 文件作为契约
+    insertContract.run(protoName, "proto-file", filePath, serviceName, pkgName);
+    contracts++;
+
+    // 提取 service 定义
+    let match: RegExpExecArray | null;
+    const serviceRe = new RegExp(PROTO_SERVICE_RE);
+    while ((match = serviceRe.exec(content)) !== null) {
+      const name = match[1];
+      insertContract.run(
+        `${protoName}.${name}`,
+        "service",
+        filePath,
+        serviceName,
+        name,
+      );
+      contracts++;
+    }
+
+    // 提取 message 定义
+    const messageRe = new RegExp(PROTO_MESSAGE_RE);
+    while ((match = messageRe.exec(content)) !== null) {
+      const name = match[1];
+      insertContract.run(
+        `${protoName}.${name}`,
+        "message",
+        filePath,
+        serviceName,
+        name,
+      );
+      contracts++;
+    }
+
+    // 提取 rpc 方法
+    const rpcRe = new RegExp(PROTO_RPC_RE);
+    while ((match = rpcRe.exec(content)) !== null) {
+      const name = match[1];
+      insertContract.run(
+        `${protoName}.rpc.${name}`,
+        "rpc",
+        filePath,
+        serviceName,
+        name,
+      );
+      contracts++;
+    }
+  }
+
+  return { contracts };
+}