What:
- update nix-openclaw to the latest stable OpenClaw source release
- refresh generated config options from that source
- keep the macOS app pin on the newest public app artifact
Why:
- keep source-built OpenClaw current without blocking on public macOS app asset lag
Tests:
- nix build .#checks.x86_64-linux.ci --accept-flake-config
- nix build .#checks.aarch64-darwin.ci --accept-flake-config
- scripts/hm-activation-macos.sh
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