[Snyk] Security upgrade zipp from 3.15.0 to 3.19.1

[abossard]

Snyk has created this PR to fix 1 vulnerabilities in the pip dependencies of this project.

Snyk changed the following file(s):

• backend/requirements.txt

⚠️ Warning

taskgroup 0.2.2 has requirement typing_extensions<5,>=4.12.2, but you have typing-extensions 4.7.1.

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[Copilot]

Pull request overview

This PR applies a Snyk-driven dependency update in the backend Python requirements to mitigate a reported vulnerability by ensuring a safe zipp version is installed.

Changes:

• Add zipp>=3.19.1 to backend/requirements.txt with an explanatory inline comment.

[Copilot]

The inline comment says this dependency is "pinned", but the specifier is a lower bound (">=3.19.1"), not an actual pin. Either update the comment to reflect that it’s a minimum secure version, or change the specifier to an actual pin/range if you intended to lock it down.

Suggested change

	zipp>=3.19.1 # not directly required, pinned by Snyk to avoid a vulnerability
	zipp>=3.19.1 # not directly required; minimum secure version recommended by Snyk to avoid a vulnerability