fix(cch): use exit code 2 to block tool calls per Claude Code hooks protocol#77

RichardHightower merged 2 commits intodevelopSpillwaveSolutions/code_agent_context_hooks:developfrom

fix/exit-code-2-blocking-protocolSpillwaveSolutions/code_agent_context_hooks:fix/exit-code-2-blocking-protocolCopy head branch name to clipboard