- Add `disallowed_tools` field to `AgentConfig` and render it as
`--disallowedTools` CLI flag in `render_agent_args`
- Set `disallowed_tools = ["ScheduleWakeup"]` on all four coder agents
(coder-1, coder-2, coder-3, coder-opus); QA and mergemaster unaffected
- Append instruction to all coder `system_prompt`s: do not use
ScheduleWakeup to wait for run_tests; if run_tests appears to time out,
call run_tests again — it attaches to the in-flight job and blocks
- Add tests: `render_agent_args_disallowed_tools` and
`coder_agents_disallow_schedule_wakeup`
dave