Add human-led conversation learning loop

docs/api.md

@@ -63,6 +63,8 @@ an administrator credential.
 | `POST` | `/api/v1/messages` | Send a message to a Reddit user with automatic account selection | admin | yes |
 | `GET` | `/api/stats` | Get bot statistics | read | no |
 | `GET` | `/api/analytics/candidate-funnel` | Get durable candidate funnel counts | read | no |
+| `GET` | `/api/learning` | Inspect attributed learning trajectories and credit | read | no |
+| `PATCH` | `/api/learning/trajectories/{id}` | Include or exclude a learning trajectory | admin | yes |
 | `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 |