fix(test): run cli.ts via tsx instead of dist/cli.js

Fixes BUG-005: the MCP initialize integration test no longer requires a
prior npm run build. Replaced dist/cli.js spawn with tsx src/cli.ts so
the test works on a clean checkout. Increased timeout to 10s to allow
tsx startup. Coverage: 88.18% (was 87.36%).

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

Author: ihor-sokoliuk

__tests__/integration/index.test.ts

@@ -9,6 +9,7 @@
 import { strict as assert } from 'node:assert';
 import { spawnSync } from 'node:child_process';
 import { fileURLToPath } from 'node:url';
+import path from 'node:path';
 import { 
   packageVersion, 
   isWebUrlReadArgs,
@@ -226,15 +227,16 @@ async function runTests() {
       params: { protocolVersion: '2024-11-05', capabilities: {}, clientInfo: { name: 'test', version: '0.1.0' } },
     }) + '\n';
 
+    const tsxBin = path.join(process.cwd(), 'node_modules', '.bin', 'tsx');
     const result = spawnSync(
-      process.execPath,
-      ['dist/cli.js'],
+      tsxBin,
+      ['src/cli.ts'],
       {
         cwd: process.cwd(),
         env: { ...process.env, MCP_HTTP_PORT: '', SEARXNG_URL: 'https://test-searx.example.com' },
         input: initMsg,
         encoding: 'utf8',
-        timeout: 5000,
+        timeout: 10000,
       },
     );