Add Moguta.CMS 13.1 operations guidance

[rdsolod-ui]

What changed

• add an audited operations and upgrades reference for Moguta.CMS 13.1.1
• add PHP, ionCube, MySQL, backup, rollback, Docker, and Nginx safety gates
• add 13.0 TCPDF to mPDF and 13.1 component-template compatibility checks
• extend the read-only inspector and test suite
• update discovery metadata and release documentation

Why

Codex needs version-aware operational guidance in addition to development references, especially for upgrades and production deployments.

Validation

• repository validator
• skill-creator quick validation
• Python compilation
• 7 inspector unit tests
• skills CLI discovery
• two independent read-only forward tests for upgrade and Docker/Nginx deployment scenarios