Address the review bot's five genuinely-new findings on the current code:
- disposal now discards any still-pending inbox items before the loop
exits, so every enqueued id gets a terminal lifecycle event.
- injection (next-step/no-wakeup) validates its payload up front, before
opening the idle one-shot turn, honoring 'invalid input throws before
any append'; and rejects attached contexts (which belong only to inbox
messages) rather than silently dropping them.
- agentMessage() freezes the agent/inbox/* payload so a listener cannot
mutate the shared correlation object mid-dispatch.
- refresh the package READMEs (compact, goal, guard, hook-protocol,
plan-mode, time-context, workspace-context) that still referenced the
removed context/message event, with the source-based user/message
distinction.
The up-front injection validation makes two finally branches unreachable
(v8-ignored as the turn-enclosure backstop). Adds regression tests for
disposal discard, context rejection, up-front validation, and the frozen
payload; per-file coverage stays 100%.