refactor: remove obsolete member management API module

apps/web/supabase/migrations/20260418000002_attendance_rollup.sql

@@ -0,0 +1,66 @@
+-- =====================================================
+-- Attendance Rollup
+--
+-- RPC that returns a per-participant attendance summary
+-- for a given course: total sessions, sessions attended,
+-- and attendance rate (%).
+-- =====================================================
+
+CREATE OR REPLACE FUNCTION public.get_course_attendance_summary(p_course_id uuid)
+RETURNS TABLE (
+  participant_id uuid,
+  participant_name text,
+  enrollment_status public.enrollment_status,
+  total_sessions bigint,
+  sessions_attended bigint,
+  attendance_rate numeric
+)
+LANGUAGE plpgsql
+STABLE
+SECURITY DEFINER
+SET search_path = ''
+AS $$
+BEGIN
+  -- Access check
+  IF NOT public.has_role_on_account(
+    (SELECT account_id FROM public.courses WHERE id = p_course_id)
+  ) THEN
+    RAISE EXCEPTION 'Access denied'
+      USING ERRCODE = '42501';
+  END IF;
+
+  RETURN QUERY
+  WITH session_count AS (
+    SELECT count(*)::bigint AS cnt
+    FROM public.course_sessions
+    WHERE course_id = p_course_id
+      AND is_cancelled = false
+  )
+  SELECT
+    cp.id AS participant_id,
+    (cp.first_name || ' ' || cp.last_name)::text AS participant_name,
+    cp.status AS enrollment_status,
+    sc.cnt AS total_sessions,
+    COALESCE(count(ca.id) FILTER (WHERE ca.present = true), 0)::bigint AS sessions_attended,
+    CASE WHEN sc.cnt > 0 THEN
+      ROUND(
+        COALESCE(count(ca.id) FILTER (WHERE ca.present = true), 0)::numeric
+        / sc.cnt * 100,
+        1
+      )
+    ELSE 0 END AS attendance_rate
+  FROM public.course_participants cp
+  CROSS JOIN session_count sc
+  LEFT JOIN public.course_attendance ca ON ca.participant_id = cp.id
+  LEFT JOIN public.course_sessions cs
+    ON cs.id = ca.session_id
+    AND cs.is_cancelled = false
+  WHERE cp.course_id = p_course_id
+    AND cp.status IN ('enrolled', 'completed')
+  GROUP BY cp.id, cp.first_name, cp.last_name, cp.status, sc.cnt
+  ORDER BY cp.last_name, cp.first_name;
+END;
+$$;
+
+GRANT EXECUTE ON FUNCTION public.get_course_attendance_summary(uuid) TO authenticated;
+GRANT EXECUTE ON FUNCTION public.get_course_attendance_summary(uuid) TO service_role;