sce v0.4.0-pre-alpha-v6

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

• build(deps): bump DeterminateSystems/determinate-nix-action from 3.21.9 to 3.22.2 by @dependabot[bot] in #231
• build(deps): bump step-security/harden-runner from 2.20.0 to 2.21.0 by @dependabot[bot] in #225
• Codex by @davidabram in #229
• runtime+context: Add passive WAL checkpoint to post-commit Agent Trace flow by @davidabram in #228
• runtime: Add independent log_to_file configuration by @stefanskoricdev in #226
• Add Quint tooling, modeling skills, and mutation cursor spec by @davidabram in #233
• build(deps): bump github/codeql-action/upload-sarif from 4.37.7 to 4.37.8 by @dependabot[bot] in #237
• Feat: Enforce Git remote preflight before setup by @ivke995 in #232
• Claude model attribution by @davidabram in #255
• config: Document schema defaults and remove unused top level timeout_ms property by @stefanskoricdev in #254
• runtime: Route unknown commands to parent help by @stefanskoricdev in #257

Full Changelog: v0.4.0-pre-alpha-v5...v0.4.0-pre-alpha-v6