Note

Medium Risk
CI/release pipeline behavior changes (multi-arch builds, artifact handling, and registry auth) can break builds or publish the wrong artifacts if misconfigured, though no application runtime logic is modified.

Overview
Bumps Fern to 3.78.1 and updates the Python generator fernapi/fern-pydantic-model from 1.11.1 to 1.11.2.

Updates the reusable GitHub Actions build workflow to run fern generate --group local during platform prepare/build jobs, adds an explicit Linux amd64 prepare job using Docker Buildx, and extends the final build job with registry logins, buildx/QEMU setup, and artifact download/arrangement while removing the build-space maximization step.

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