ci: align the release workflows with the monorepo

[userAugustos]

Goal

The CLI and core releases build from the monorepo packages through the root build task, with one version source per package.

Acceptance Criteria

• The CLI binaries, wheel, and PyPI upload build through bun run build with a package filter.
• The core image builds from packages/core through the same flow.
• A version bump updates uv.lock in the same commit.
• A release does not start from a commit that only touches unrelated files.

Guidance

• Stacked on the CI PR. Plan the details after that PR merges.
• Keep the current tag names and asset names so the install script and the Homebrew formula keep working.