Add durable candidate funnel

docs/api.md

@@ -60,6 +60,7 @@ an administrator credential.
 | `GET` | `/api/v1/jobs/{id}` | Get asynchronous job state | read | no |
 | `POST` | `/api/v1/jobs` | Start chat or media synchronisation | control | yes |
 | `GET` | `/api/stats` | Get bot statistics | read | no |
+| `GET` | `/api/analytics/candidate-funnel` | Get durable candidate funnel counts | read | no |
 | `GET` | `/api/activity` | Get recent activity | read | no |
 | `GET` | `/api/posts/by-author/{username}` | Get processed posts by author | read | no |
 | `GET` | `/api/messages` | Get recent sent messages | read | no |