Collect Alpine Linux security advisories from https://security.alpinelinux.org/

[keshav-space]

Currently we import data from https://secdb.alpinelinux.org/, but we also have advisories at https://security.alpinelinux.org/.
For example https://security.alpinelinux.org/vuln/CVE-2025-15224 contains much more information than secdb, including fixed/affected versions summaries, references.

[aarushi-sharma-09]

Hi @keshav-space, I would like to work on this issue.

I verified locally that sending a request with Accept: application/ld+json returns the full advisory data (including description, affected/fixed versions, and references) as a clean JSON object.

My Plan:

Create a new Importer class for Alpine Security.
Use requests with the Accept header to hit the endpoints directly.
Map the returned JSON fields to the VulnerableCode data model.

Please assign this to me!