Improve SEO

[Musilah]

Following the org-wide SEO guidance documented here update https://cube.ultraviolet.rs/ to improve its SEO baseline and overall audit score.

This issue tracks the hardware-specific implementation checklist:

• Homepage metadata stays aligned with confidential AI / secure LLM positioning.
• Use-case pages each have distinct titles, descriptions, canonicals, and H1s.
• Use-case pages can stand alone as landing pages for regulated-industry searches.
• Homepage and docs pages include valid schema and keep @id relationships consistent.
• robots.txt, sitemap, and llms.txt remain aligned whenever routes change.
• Docs and use-case pages link back into core product pages intentionally.
• Partner, standards, and compliance claims stay factual and current.
• Key platform proof points remain visible in SSR HTML.

Notes

• Cube is already closer to the target baseline than the other sites.
• Here the work is less about fixing broken fundamentals and more about keeping consistency as the site grows.