v0.4.3

• Update the kodex-home skill with filesystem operations and Session structure documentation.
• Use threadId as the default stable cache key.
• Send Medium reasoning effort explicitly.
• Fix standalone read-only history views for completed Session suggestions.
• Seal the stable event hierarchy, enforce exhaustive dispatch, and preserve historical JSON compatibility.
• Fix lease cleanup deadlocks and races in history interaction tests.
• Complete the model-call diff review and integration validation.
• Complete the four-platform 0.4.2 release and move the local notification script out of PATH.

Full Changelog: v0.4.2...v0.4.3