Migrate Nginx importer to advisory V2

[ziadhany]

Issue:

• Migrate nginx importer #2106

[ziadhany]

Importing data using nginx_importer_v2
INFO 2026-01-19 11:55:00.255063 UTC Pipeline [NginxImporterPipeline] starting
INFO 2026-01-19 11:55:00.255214 UTC Step [fetch] starting
INFO 2026-01-19 11:55:00.255269 UTC Fetch `https://nginx.org/en/security_advisories.html`
INFO 2026-01-19 11:55:00.610653 UTC Step [fetch] completed in 0 seconds
INFO 2026-01-19 11:55:00.610980 UTC Step [collect_and_store_advisories] starting
INFO 2026-01-19 11:55:00.611169 UTC Collecting 42 advisories
INFO 2026-01-19 11:55:00.761049 UTC Progress: 11% (5/42) ETA: 1 seconds
INFO 2026-01-19 11:55:00.818259 UTC Progress: 21% (9/42) ETA: 1 seconds
INFO 2026-01-19 11:55:00.904199 UTC Progress: 33% (14/42) ETA: 1 seconds
INFO 2026-01-19 11:55:00.974590 UTC Progress: 45% (19/42)
INFO 2026-01-19 11:55:01.051762 UTC Progress: 57% (24/42)
INFO 2026-01-19 11:55:01.134207 UTC Progress: 69% (29/42)
INFO 2026-01-19 11:55:01.227462 UTC Progress: 80% (34/42)
InvalidVersionRange fixed_version_range: none - error: 'none' is not a valid <class 'univers.versions.NginxVersion'>
INFO 2026-01-19 11:55:01.281227 UTC Progress: 90% (38/42)
INFO 2026-01-19 11:55:01.339047 UTC Progress: 100% (42/42)
INFO 2026-01-19 11:55:01.354337 UTC Successfully collected 42 advisories
INFO 2026-01-19 11:55:01.354450 UTC Step [collect_and_store_advisories] completed in 1 seconds
INFO 2026-01-19 11:55:01.354505 UTC Pipeline completed in 1 seconds

Process finished with exit code 0

from vulnerabilities.models import AdvisoryV2
from django.db.models import Count
duplicates = (
    AdvisoryV2.objects
    .values('avid')
    .annotate(count=Count('id'))
    .filter(count__gt=1)
)
len(duplicates)
Out[5]: 0
AdvisoryV2.objects.count()
Out[6]: 42