Restore default.version on flake output used by image tooling

[Copilot]

Switching packages.x86_64-linux.default to a symlinkJoin removed the version attribute expected by existing automation (build-image.sh via nix eval). This change re-exposes version on the default package without altering package selection or build outputs.

• Problem surface

  • build-image.sh reads .#packages.x86_64-linux.default.version.
  • default now points to tablo (symlinkJoin), which did not expose version.

• Change

  • Added passthru.version to the tablo symlinkJoin derivation in flake.nix.
  • Kept default = tablo unchanged; no output graph reshaping.

• Result

  • packages.x86_64-linux.default.version is available again for existing tooling.
  • No behavioral change to package composition, only metadata compatibility restoration.

tablo = pkgs.symlinkJoin {
  name = "tablo-${version}";
  paths = [ libtabcrypt tablo-node tablo-client tablo-master ];

  passthru = {
    inherit version;
  };
};

• Fixes Existing tooling went incompatible with new outputs #19

[TureBentzin]

bentzin@wsl-laptop ~/w/Tablo (copilot/fix-default-output-version) > nix eval --raw .#packages.x86_64-linux.default.version
1.3¶      

[Sobottasgithub]

Its fine but can you merge it on the implement_tql branch?

[TureBentzin]

I changed the target branch