AKUNUR 2.10.5 STABLE VALIDATION NOTE

- This branch intentionally changes version identity and documentation only.
- JavaScript syntax checks passed for every .js file.
- Its board/rules behaviour was used as the reference for a 250-decision parity test against Akunur 3.0.0-alpha.1.
- Full manual UI regression remains recommended before deployment over an existing 2.10.4 installation.
