feat: 添加E2E测试环境配置支持

添加LOTTERY_E2E环境变量来控制E2E测试相关功能，
包括绕过验证码、登录限制和钱包API URL验证，
同时更新composer.json以包含E2E专用的提供者和服务。

e2e/scripts/mock-wallet-server.mjs

@@ -0,0 +1,82 @@
+#!/usr/bin/env node
+/**
+ * E2E 主站钱包 mock：供 transfer-in/out 异常场景（504 / 业务拒绝）。
+ *
+ * 控制端点：
+ *   POST /_e2e/mode  body: { "mode": "success" | "504" | "reject" }
+ *
+ * 业务端点（与 config lottery.main_site 默认路径一致）：
+ *   POST /wallet/debit-for-lottery
+ *   POST /wallet/credit-from-lottery
+ */
+
+import http from 'node:http';
+
+const PORT = Number(process.env.E2E_MOCK_WALLET_PORT ?? 5555);
+let mode = process.env.E2E_MOCK_WALLET_MODE ?? 'success';
+
+function readBody(req) {
+  return new Promise((resolve) => {
+    const chunks = [];
+    req.on('data', (c) => chunks.push(c));
+    req.on('end', () => resolve(Buffer.concat(chunks).toString('utf8')));
+  });
+}
+
+function json(res, status, body) {
+  res.writeHead(status, { 'Content-Type': 'application/json' });
+  res.end(JSON.stringify(body));
+}
+
+const server = http.createServer(async (req, res) => {
+  const url = req.url ?? '/';
+  const method = req.method ?? 'GET';
+
+  if (method === 'POST' && url === '/_e2e/mode') {
+    try {
+      const raw = await readBody(req);
+      const parsed = JSON.parse(raw || '{}');
+      if (typeof parsed.mode === 'string') {
+        mode = parsed.mode;
+      }
+      json(res, 200, { mode });
+    } catch {
+      json(res, 400, { error: 'invalid_json' });
+    }
+    return;
+  }
+
+  if (method === 'GET' && url === '/_e2e/health') {
+    json(res, 200, { ok: true, mode });
+    return;
+  }
+
+  const isWallet =
+    method === 'POST' &&
+    (url === '/wallet/debit-for-lottery' || url === '/wallet/credit-from-lottery' || url.startsWith('/wallet/'));
+
+  if (!isWallet) {
+    json(res, 404, { error: 'not_found' });
+    return;
+  }
+
+  if (mode === '504') {
+    json(res, 504, { success: false, message: 'gateway_timeout' });
+    return;
+  }
+
+  if (mode === 'reject') {
+    json(res, 200, { success: false, message: 'credit_denied' });
+    return;
+  }
+
+  json(res, 200, {
+    success: true,
+    external_ref: `mock-${Date.now()}`,
+    message: 'ok',
+  });
+});
+
+server.listen(PORT, '127.0.0.1', () => {
+  console.log(`[e2e-mock-wallet] listening on http://127.0.0.1:${PORT} mode=${mode}`);
+});