Security hardening + new tools deployment

- Hide Apache version (ServerTokens Prod)
- Add Permissions-Policy header
- Remove deprecated X-XSS-Protection
- Consolidate security headers to .htaccess only (remove duplicates from PHP)
- Deploy free tools: robots-analyzer, data-converter
- Deploy tools announcement blog post
- Update sitemap with new tools and blog post

blog/articles/data-analytics-companies-london-top-providers-compared.php

@@ -1,14 +1,10 @@
 <?php
 // Enhanced security headers
-header('X-Content-Type-Options: nosniff');
-header('X-Frame-Options: DENY');
-header('X-XSS-Protection: 1; mode=block');
 header('Strict-Transport-Security: max-age=31536000; includeSubDomains');
-header('Referrer-Policy: strict-origin-when-cross-origin');
 
 // SEO and performance optimizations
-$page_title = "Data Analytics Companies London: Top 10 Providers Compared 2025 | UK Data Services";
-$page_description = "Compare London's leading data analytics companies. Expert analysis of services, pricing, specializations, and client reviews to help you choose the perfect analytics partner in 2025.";
+$page_title = "Best Data Analytics Companies in London (2025): 10 Providers Ranked by Speciality";
+$page_description = "We ranked London's top data analytics companies by speciality: predictive analytics, BI dashboards, data engineering, and AI/ML. Pricing, client reviews, and which firm fits your needs.";
 $canonical_url = "https://ukdataservices.co.uk/blog/articles/data-analytics-companies-london-top-providers-compared";
 $keywords = "data analytics companies London, business intelligence firms London, data science companies UK, analytics consultants London, big data companies";
 $author = "UK Data Services Editorial Team";
@@ -62,6 +58,7 @@ $modified_date = "2025-08-08";
     
     <!-- Styles -->
     <link rel="stylesheet" href="../../assets/css/main.css">
+    <link rel="stylesheet" href="../../assets/css/cro-enhancements.css">
     
     <!-- Article Schema -->
     <script type="application/ld+json">
@@ -936,5 +933,6 @@ $modified_date = "2025-08-08";
         });
     });
     </script>
+<script src="../../assets/js/cro-enhancements.js"></script>
 </body>
 </html>