chore(main): release 0.43.0

[github-actions]

🤖 I have created a release beep boop

0.43.0 (2026-09-02)

⚠ BREAKING CHANGES

• api: move commit batching onto GitTarget, delete allowedSourceNamespaces, and make sourceNamespace "*" cluster-wide (#330)

Features

• api: move commit batching onto GitTarget, delete allowedSourceNamespaces, and make sourceNamespace "*" cluster-wide (#330) (f994a90)
• gittarget: add spec.serializeNamespace and placement.useKustomize, and fence a namespace-free folder to one source namespace (#328) (18d4ac7)
• gittarget: add spec.suspend and status.placement, refuse ambiguous layouts, and execute the layout corpus (#326) (1ce4f4d)

Documentation

• layout: reverse the layout model onto two optional booleans, and shrink the source-scope surface (#325) (db20d17)

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