Spine v3.57.1

What's Changed

Other changes

• docs(state): 3.57.0 is on PyPI by @ssmith-synaptixs in #535
• fix(intake): preserve stated why fields in OpenSpec drafts by @ssmith-synaptixs in #534
• fix(sdlc): exclude test scratch and show changed code to acceptance judge by @ssmith-synaptixs in #536
• chore(release): cut Spine 3.57.1 by @ssmith-synaptixs in #537
• chore(release): sync main history before 3.57.1 promotion by @ssmith-synaptixs in #539
• chore(release): promote Spine 3.57.1 to main by @ssmith-synaptixs in #538

Full Changelog: v3.57.0...v3.57.1