Remove SRI integrity checks from Bootstrap CDN links

Fixes Bootstrap CSS not loading on Railway deployment.

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

templates/base.html

@@ -5,9 +5,7 @@
   <meta name="viewport" content="width=device-width, initial-scale=1">
   <title>{% block title %}fx-quant{% endblock %}</title>
   <link href="https://cdn.jsdelivr.net/npm/bootstrap@5.3.3/dist/css/bootstrap.min.css"
-        rel="stylesheet"
-        integrity="sha384-QWTKZyjpPEjISv5WaRU9OFeRpok6YcnS/1p0TIMQ77Kv3OSpcXkig1hYZLRFss0K"
-        crossorigin="anonymous">
+        rel="stylesheet">
   <style>
     body { background: #f8f9fa; }
     .navbar-brand { font-weight: 700; letter-spacing: 1px; }
@@ -45,8 +43,6 @@
     {% block content %}{% endblock %}
   </div>
 
-  <script src="https://cdn.jsdelivr.net/npm/bootstrap@5.3.3/dist/js/bootstrap.bundle.min.js"
-          integrity="sha384-YvpcrYf0tY3lHB60NNkmXc5s9fDVZLESaAA55NDzOxhy9GkcIdslK1eN7N6jIeHz"
-          crossorigin="anonymous"></script>
+  <script src="https://cdn.jsdelivr.net/npm/bootstrap@5.3.3/dist/js/bootstrap.bundle.min.js"></script>
 </body>
 </html>