Tracker patterns detected on the same banner that share initiator
domains are a strong indicator of the same third party. Previously the
mapping worker only checked the global third-party domain catalog, so a
tracker whose domain was not registered there fell through to the
expensive LLM identification step even when a co-located pattern was
already mapped.
Add a matchBySiblingOrigin step that finds other patterns on the same
banner sharing the same initiator domains and reuses their resolved
common third party. It prefers siblings already promoted to an org
third party (the strongest signal) and falls back to siblings carrying
only a catalog link, skipping when the siblings disagree. The step runs
before the catalog domain lookup since an already-qualified sibling is
at least as reliable as a raw domain match.
Signed-off-by: Émile Ré <emile@probo.com>
2a0523c5f2