v4.0.4

Added

• examples/jack bounds its conversation memory. A session re-sends its whole history every
  turn, and tool results here are documentation pages, one of which is 30 KB. Fifteen turns
  reached a 320 KB request and the endpoint then rejected every later turn in that session
  permanently. jack.session.BoundedSessions is a Deck(session_factory=...) that keeps only the
  most recent whole exchanges, cutting at user-message boundaries so a tool call is never
  separated from its result.
• examples/jack can trace itself. Setting AGENTDECK_LANGFUSE_PUBLIC_KEY attaches the
  packaged Langfuse observer, and setting AGENTDECK_EVENTS to a sqlite:// URL makes the run
  log durable. Both are off by default, so a clone still runs with no backend. Both store what
  callers typed; the example's README says what that means for a public endpoint.

Fixed

• Three documentation pages stated things the code does not do. runs-and-control/lifecycle-and-control
  listed a QUEUED state and uppercase names; the six real values are running, paused,
  waiting_answer, completed, failed and cancelled. reference/events listed
  message.delta, tool.call and tool.result, none of which exist, and omitted 14 kinds that
  do; it now covers all 21 with their payloads. The Quickstart printed an invented transcript,
  read run.status as a property when it is a coroutine, and iterated run.events() without
  follow=True, which returns only what the log already holds.