[Bpoe]

Linux releases currently provide native packages only for AMD64. This adds ARM64 DEB and RPM downloads using the same native packaging and release safeguards as the existing builds.

Changes

• Add an ubuntu-24.04-arm CI job that builds ARM64 archives and installers and runs the existing inspection and DEB/Fedora RPM lifecycle checks.
• Share Linux architecture detection across packaging scripts, using arm64 for DEBs and aarch64 for RPMs while preserving AMD64 filenames.
• Include ARM64 assets in draft releases and the combined SHA256SUMS. Extend regression coverage to reject missing or corrupted ARM64 assets and document the new downloads.

Validation

• Passed release version and mocked release safeguard tests, actionlint, ShellCheck, and architecture-mapping checks.
• Built actual AMD64 and ARM64 DEB/RPM packages and verified metadata, payload hashes, permissions, and extracted executable smoke tests. ARM64 executable checks used isolated QEMU emulation.
• Native ARM64 installer lifecycle checks are wired into CI; they were not run locally.