* fix(whatsapp): consolidate fragmented phone/LID contacts to prevent lost messages
When a WhatsApp user had two separate contacts (one by phone, one by LID)
with different contact_ids, the consolidation service did nothing. This caused
update_contact_info to crash with a phone_number uniqueness violation, silently
dropping incoming messages.
Now properly merges the two contacts by treating the phone contact as canonical,
moving conversations from the LID contact, and cleaning up duplicates.
Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
* fix(whatsapp): address CodeRabbit review feedback
- Destroy orphaned LID contact when it has no remaining contact_inboxes
- Clarify spec comment to past-tense (no longer an active bug)
Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
* fix(whatsapp): route legacy-source contact_inbox into merge path
When a phone contact_inbox has a non-standard source_id (legacy format)
and a separate LID contact_inbox exists for a different contact,
the consolidation now merges them instead of early-returning.
Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
* test: assert orphaned LID contact is destroyed in legacy-source spec
Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
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Co-authored-by: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
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