v6.0.1

Changed

• A completed run reports the artifacts it produced (#636). run.completed's
  output: list[ContentBlock] now leads with the media the run made - a hosted
  ImageGenerationTool image, a rich tool's image or file - and closes with the final text or
  structured block, so a channel can send the image and caption it from one result instead of
  reassembling it from executor events. Nothing else from the transcript is promoted, and a
  text-only run is byte for byte what it was. The inline cap on ImageBlock/AudioBlock moves
  from 1 MB to 8 MB decoded, because a generated PNG does not fit under 1 MB.

Fixed

• A @workflow returning content blocks crashed its own run (#636). Anything other than a
  TextBlock or DataBlock was wrapped in a DataBlock that could not hold it; a body may now
  return any list of blocks and run hands back exactly those blocks.

• ctx.invoke's return shape was undocumented. await ctx.invoke(<agent>) resolves to a
  TurnResult (value at .output), await ctx.invoke(<tool|workflow>) resolves to the body's
  return value directly, and ctx.parallel(...) resolves to a list of each handle's own result,
  never to handles. build-your-deck/workflows now states all three, and
  WorkflowCtx.invoke's docstring no longer claims the body's return value unconditionally
  (#489).