fix: add --data-dir flag to ethlambda

[MegaRedHand]

We added a --data-dir flag to ethlambda, but lean-quickstart isn't using it.

This PR adds the flag to ethlambda-cmd.sh, so the node data is stored in the right place. Also removes a .DS_Store file that was in the repo.

[Copilot]

Pull request overview

This PR updates lean-quickstart’s Ethlambda client launcher to pass the newly supported --data-dir flag so Ethlambda stores its node data under the expected per-node data directory, and removes an accidentally committed macOS metadata file.

Changes:

• Add --data-dir to Ethlambda binary invocation ($dataDir/$item) so per-node data is written to the correct location.
• Add --data-dir /data to Ethlambda docker invocation to align with the existing /data volume mount.
• Remove the tracked .DS_Store file from the repo.

Reviewed changes

Copilot reviewed 1 out of 2 changed files in this pull request and generated no comments.

File	Description
client-cmds/ethlambda-cmd.sh	Passes --data-dir for both binary and docker execution so Ethlambda writes data to the intended directory.
.DS_Store	Removes an accidentally committed macOS Finder metadata file.

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[ch4r10t33r]

@MegaRedHand you will need to add the same configuration to ansible/roles/ethlambda/tasks/main.yml. I am working on some improvements, which will remove such duplicate code, but that is likely to be completed a bit later. So for now can you please add the same change in that file as well?

[MegaRedHand]

@ch4r10t33r Done in 6ffa260

[ch4r10t33r]

Looks good.