When multiple patterns match the same category+zone, the first creates
the hazard and later patterns add their SuggestedMeasureIDs to the
existing hazard. This ensures KSS-specific measures (M420) reach the
hazard even if a generic pattern created it first.
seenCatZone changed from map[string]bool to map[string]uuid.UUID
to track which hazard ID was created for each dedupKey.
Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
Benjamin Admin
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