rn2025

[aleksandrkislitsyn]

Note

Updates documentation to reflect the 2512 LTS release and recent monthly channels.

• Adds January 2026 edge section and promotes December 2025 to latest, 2512, LTS with noted features (native Subscriptions, 2FA docs, performance, validator/security fixes)
• Normalizes monthly headers (e.g., stable, 2511, 2510, 2509)
• Updates versioning.md LTS table to include 2512 and removes the outdated LTS changelog section

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