Claude Code: Fix worker initialization race condition with heartbeat retry

Claude Code: Add heartbeat logging to diagnose worker initialization failure

Claude Code: Add fail-loud exception logging to brain_minimal.py

Claude Code: Fix worker process initialization with env vars, buffer draining, and health verification

Refactor heartbeat from File I/O to In-Memory IPC

Claude Code: Fix race condition between heartbeat and polling loops

Claude Code: Fix worker state stuck in 'idle' by setting state to 'active' in heartbeat loop

Claude Code: Fix worker loop state stuck in 'idle' by properly updating current_state

Claude Code: Fix silent worker loop initialization failure

Claude Code: Improve defensive .env handling with robust error logging

Claude Code: Add defensive .env initialization to brain_minimal.py

Claude Code: Implement robust process management for brain_minimal.py using a watchdo