[codex] publish 1.5.79 stable

[akaydev-coder]

Summary

Publishes the accumulated production changes from 1.5.62.0 through 1.5.79.0 Stable.

Changes

• adds the isolated native Explorer background renderer and scoped GDI hooks
• updates the managed/native bridge and renderer lifecycle
• packages the production configuration and version metadata for 1.5.79.0
• removes temporary background diagnostic counters and exports while retaining real error/crash logging
• adds native background renderer smoke-test sources
• updates README, credits, changelog, and release notes

Impact

This establishes the tested 1.5.79.0 Stable baseline before the next production hotfixes are developed.

Validation

• managed and native x86/x64 Release builds succeeded
• WiX MSI and bootstrapper builds succeeded
• 31/31 .NET Framework 4.8 tests passed
• final installer, managed DLL, and native DLLs report version 1.5.79.0