v0.12.0

Added

• Published the codedebrief package on PyPI and made uv tool install codedebrief the primary install path.
• Added a README screenshot for the manual codedebrief view canvas.

Changed

• Updated generated agent guidance so workflow artifacts are refreshed after workflow-relevant changes.
• Made CodeDebrief workflow visuals vertical by default, with horizontal output reserved for explicit compact-overview requests.

Fixed

• Fixed the manual viewer details rail so the Analysis Health panel no longer leaves a stale empty source panel when no flow source is selected.