sce v0.4.0-pre-alpha-v4

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

• trace: Improve sync progress and resilience by @davidabram in #206
• fix workflows by @davidabram in #205
• build(deps): bump DeterminateSystems/determinate-nix-action from 3.21.8 to 3.21.9 by @dependabot[bot] in #173
• build(deps): bump github/codeql-action/upload-sarif from 4.37.3 to 4.37.4 by @dependabot[bot] in #175
• trace: Prefix conversation-trace session IDs by producer by @stefanskoricdev in #208
• cli: Promote Agent Trace sync to a top-level command by @stefanskoricdev in #215
• Restore Claude transcript model attribution by @davidabram in #219
• auth: Improve sce auth CLI command experience by @stefanskoricdev in #218
• auto-sync by @davidabram in #220
• Typed cli errors by @davidabram in #222
• build(deps): bump github/codeql-action/upload-sarif from 4.37.4 to 4.37.7 by @dependabot[bot] in #213
• build(deps): bump step-security/harden-runner from 2.20.0 to 2.21.0 by @dependabot[bot] in #211

Full Changelog: v0.4.0-pre-alpha-v2...v0.4.0-pre-alpha-v4