The generated tracker policy listed only org ThirdParty rows linked to
the banner's patterns. Now that the mapping worker no longer auto-creates
those rows, a banner whose vendors have not been imported would render an
empty third-party section.
Build the list from the same union the banner's linkedThirdParties
resolver exposes: org ThirdParty rows plus the CommonThirdParty catalog
entries reached through patterns that carry no org link. Dedupe by name
with org rows taking precedence, so the policy stays complete and
accurate whether or not a vendor has been imported into the register.
Signed-off-by: Émile Ré <emile@probo.com>