chore(deps): pin dependencies

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This PR contains the following updates:

Package	Type	Update	Change
cachix/cachix-action	action	pinDigest	→ 0fc0201
cachix/install-nix-action	action	pinDigest	→ 4e002c8

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[deepsource-io]

Here's the code health analysis summary for commits 1d802f8..885025d. View details on DeepSource ↗.

Analysis Summary

Analyzer	Status	Summary	Link
Secrets	✅ Success		View Check ↗
Python	✅ Success		View Check ↗

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Quality Gate passed

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0.0% Duplication on New Code

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