Department Analytics

Customer Service Analytics -- the department health-and-productivity read-model (Frederick Hutson, 2026-08-09): "Analytics should just be all the things that someone will want to know to gauge the health and productivity of a customer service department ... rooted in the company OS's overall." Gated the SAME way GET /department-overview above already is (admin:people:read) -- this is the same manager/admin audience, a second section of the same page, not a new audience, and kinds is scoped the SAME way GET /department-overview's own fix scopes it (2026-08-11, Cindy Palma) -- the caller's own tickets:b2c/tickets:b2g grants, never the full kind list just because the page-access gate passed.

See department_analytics_service's own module docstring for the full reuse map (lifecycle.compute_ours_seconds for every duration, supervisor_service.compute_agent_metrics for deflection/escalation, supervisor_service.gather_rooster_performance for the Wilson lower bound) and for why Rooster's figures here are DEPARTMENT-wide, a different question than GET /rooster-performance's own per-caller desk view above -- see gather_rooster_department's docstring.