chore(main): release 0.57.2

[Ank-KhoaHo]

🤖 I have created a release beep boop

0.57.2 (2026-09-21)

Fixed

• ci: add .dockerignore so the container guard cannot pass on host build output (d9291ba)

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This PR was generated with Release Please. See documentation.

[Ank-KhoaHo]

Before merging this

Merging tags the version and publishes both packages to nuget.org. A published version can be
unlisted but never edited, so everything below is cheaper now than at any point afterwards.

• Read the changelog entry in the diff. An entry that is empty, or that says nothing a
  consumer would act on, is a signal to let more changes accumulate rather than release now.

• Does anything here CHANGE existing behaviour? release-please files every feat: under
  Added, which reads as a new capability. A changed default, a different output, or a new
  exception from a call that used to succeed is none of those — and a consumer upgrading will
  not learn about it from an Added line. Move it to Changed by hand, with the one-line
  migration.

  Not hypothetical: **0.13.0** changed generated documents from whatever the reader's template
  chose to A4, and the entry said only "defaulting to A4", filed under *Added*.
  

• Does the nuget.org <Description> still describe what ships? Check it against the
  generated docfx/guides/capabilities.md. CI proves the
  field is non-empty; nothing can prove it is true. It described a smaller library than
  shipped for four releases.

• Once you arm auto-merge, this PR is finished. Pushing to it afterwards is a race that is
  lost silently — git push reports success either way, and the commit is orphaned on a dead
  branch. Anything further goes on a new branch.

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Editing CHANGELOG.md on this branch is all that is needed. The GitHub Release body is derived
from that entry automatically after merge, so the two cannot drift apart — they did on 0.27.2,
where the curated changelog and the published release notes disagreed until somebody noticed by hand.

[github-actions]

This entry is still release-please's generated text.

0.57.2: 1 generated item(s), 0 line(s) of human content.

  NOTHING HAS BEEN CURATED. Every line is still release-please's text, derived
  from commit titles - so a behaviour change committed as `feat:` is sitting
  under Added described as a new capability, and anything that arrived inside a
  squashed stacked PR may have no entry at all.

  If you curated this already, a later merge to main has REGENERATED it.
  Curate immediately before merging, with nothing else in flight.

Updated whenever this branch changes - by release-please regenerating the entry, or by a curation being pushed. Re-read it immediately before merging.