The enrichment worker no longer invents a description when a tracker's
purpose cannot be substantiated; it records an empty description and
marks the row enriched so the stale-recovery loop does not retry it.
Vendor identification is the mapping pipeline's job, so the enricher
reuses the existing tracker-mapping agent to attribute a third party
for an unlinked common pattern before describing it. A confident
catalog match seeds the enrichment prompt and links the pattern, but
the enricher never creates or overrides an attribution.
When a blank, unlinked catalog row later gains a third party through
the mapping pipeline's upsert, enrichment is re-armed so the now-known
vendor gets a second, better-informed description attempt.
Signed-off-by: Émile Ré <emile@probo.com>
