New "Customer analytics" page under Monitoring: surfaces who is actively in
contact vs. who has gone quiet, so the team can reach out before a customer
slips away.
- KPI tiles: total / active / no-contact / never-in-contact
- "Customers without recent contact" — longest silence first
- "Top customers by communication" — most ticket activity in the period
- Configurable no-contact threshold (helpdesk settings, default 60 days)
CustomerEngagementService aggregates the global ticket snapshot per customer
(same single-pull model as RiskRadarService — no N+1 to BC). Last contact is
the most recent ticket activity; silence beyond the threshold flags the
customer. Revenue ranking deferred (BC OData exposes no per-customer ledger).
All within modules/helpdesk/. Tests + PHPStan green.
Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
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