SEO fixes: author bylines, 2025 dates, phone removal, case studies, Companies House

- Assign named authors to all 14 blog articles that defaulted to Editorial Team
- Replace team-based author labels (DevOps Team, Legal Team etc) with named authors
- Update 2025 -> 2026 in ecommerce trends, buyers guide, and python pipeline titles
- Remove phone number (01692 Norfolk) from all pages and schema
- Anonymise unverifiable case study clients (TechElectronics UK, Heritage Bank UK)
- Add clickable Companies House link (08576932) to footer

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

includes/footer.php

@@ -91,7 +91,7 @@
                 <div class="footer-copyright">
                     <p>&copy; <?php echo date('Y'); ?> UK Data Services. All rights reserved.</p>
                     <p class="company-details">
-                        Company No: 08576932
+                        Company No: <a href="https://find-and-update.company-information.service.gov.uk/company/08576932" rel="nofollow" target="_blank">08576932</a>
                     </p>
                 </div>
                 <div class="social-links">