Add manual outreach funnel clearing

docs/api.md

@@ -108,6 +108,7 @@ an administrator credential.
 | `GET` | `/api/analytics/ai-usage` | Get OpenRouter cost and model reliability | read | no |
 | `GET` | `/api/attention` | Get operator attention items | read | no |
 | `GET` | `/api/outreach` | Get active outreach candidates and funnel stages | read | no |
+| `DELETE` | `/api/outreach` | Cancel every unsent outreach candidate except in-flight sends | admin | yes |
 | `GET` | `/api/growth` | Get per-account comment growth state | read | no |
 | `GET` | `/api/growth/{accountId}` | Get one account's growth settings, communities and comment history | read | no |
 | `PATCH` | `/api/growth/{accountId}` | Enable, disable or re-pace comment growth for an account | admin | yes |