Vulkan PostFX 1.9.2

Added

• Added VPFX failure diagnostic report.
• External VPFX pack failures now write: run/vulkanpostfx_runtime/diagnostics/latest-vpfx-error.txt
• Diagnostic reports include:
  • timestamp
  • pack name / external post effect id
  • backend id and capabilities
  • failure stage
  • exception class and message
  • fallback state
  • stack trace
• Added VPFX troubleshooting guide: docs/vpfx-troubleshooting.md

Improved

• External VPFX failures are now easier to diagnose from user reports.
• Diagnostic write failures are logged as warnings and do not crash the game.
• README now links to the VPFX troubleshooting guide.

Notes

VPFX v1 remains alpha.
The current execution backend is still minecraft_postchain.