v2.2.8-beta0 - Compress workflow and prompt/runtime updates

What's Changed

• Added /dcp decompress and /dcp recompress command workflows with better compression status and notification behavior.
• Added custom prompt overrides.
• Improved compress robustness with graceful fallback handling and fixes for nested compression protected-tool injection.

Full Changelog: v2.2.6-beta0...v2.2.8-beta0