sce v0.4.0-pre-alpha-v10

CLI release assets

• Canonical sce archives are published as sce-v<version>-<target-triple>.tar.gz
• Per-archive SHA-256 checksum files are published as sce-v<version>-<target-triple>.tar.gz.sha256
• Combined artifact metadata is published as sce-v<version>-release-manifest.json
• Combined artifact manifest signatures are published as sce-v<version>-release-manifest.json.sig
• Combined checksums are published as sce-v<version>-SHA256SUMS
• The npm package tarball is published as sce-v<version>-npm.tgz
• Flatpak source-built packaging metadata is published as sce-v<version>-flatpak-manifest.tar.gz, with matching .sha256 and .json metadata assets; this is not a prebuilt Flatpak app or Flathub publication.
• Flatpak source-built .flatpak bundles are published as sce-v<version>-x86_64.flatpak and sce-v<version>-aarch64.flatpak, with matching .sha256 and .json metadata assets; install directly with flatpak install --user <url>.

What's Changed

• single tokio runtime by @davidabram in #300
• remove tokio db runtimes by @davidabram in #301
• Otel wiring by @davidabram in #325
• commit fingerprinting by @davidabram in #326
• new sce banner by @davidabram in #328

Full Changelog: v0.4.0-pre-alpha-v9...v0.4.0-pre-alpha-v10