fix(nix): anchor result* source filter so result_xdr.py is packaged

The uv2nix workspace source is filtered through
`nix-gitignore.gitignoreSourcePure` to drop the `./result` nix build
symlink. The pattern was written as `result*` with no leading slash, so
by gitignore semantics it matched a path component named `result…` at
ANY depth — including `src/komet_node/result_xdr.py`.

That file was therefore stripped from the packaged source on every build
(cachix included), while `server.py` imports it unconditionally, so the
installed `komet-node` crashed on startup with:

    ModuleNotFoundError: No module named 'komet_node.result_xdr'

Anchoring the pattern to the workspace root (`/result*`) still excludes
the top-level build symlinks (`result`, `result-1`, …) without matching
nested source files.

Author: RaoulSchaffranek

nix/komet-node-pyk/default.nix

@@ -19,7 +19,12 @@ let
     workspaceRoot = lib.cleanSource (nix-gitignore.gitignoreSourcePure [
         ../../.gitignore
         ".github/"
-        "result*"
+        # Anchor to the repo root so this only excludes the top-level `./result*`
+        # nix build symlinks. Without the leading slash the gitignore pattern
+        # matches any path component starting with "result" at any depth, which
+        # silently dropped `src/komet_node/result_xdr.py` from the packaged
+        # source and made the built node crash with `ModuleNotFoundError`.
+        "/result*"
         # do not include submodule directories that might be initilized empty or non-existent due to nix/git
         # otherwise cachix build might not match the version that is requested by `kup`
         # TODO: for new projects, add your submodule directories that are not required for nix builds here!