[Bug]: GetTags does not follow Registry API pagination (Link header)

[Abhineshhh]

Version

sbi version: main @ d9404ec
Go: 1.26.5

What happened?

RegistryScanner.GetTags performs a single GET /v2/{repo}/tags/list and decodes one JSON body. The Docker Registry HTTP API paginates via the Link response header (rel=next). Repositories with many tags can silently return only the first page, under-reporting tags before FilterTags / LimitTags.

Expected: Follow Link: <url>; rel=next until exhausted (with a sane page size), concatenating all tags.

Steps to reproduce

1. Inspect GetTags in pkg/infrastructure/scanner/registry.go — no Link handling.
2. Against a registry that paginates tags, compare the full tag list vs SBI output.