keyman crashing with Invalid platform: github_rest

> [!NOTE]
> Migrated from [augurlabs/augur#3700](https://github.com/augurlabs/augur/issues/3700)
> Originally opened by `@MoralCode` on 2026-02-15

---

Stack Trace

```
augur-keyman-1 | 2026-02-15 21:24:29,882 - KeyOrchestrator - ERROR - Error during REQUEST
augur-keyman-1 | Traceback (most recent call last):
augur-keyman-1 | File "/augur/keyman/Orchestrator.py", line 188, in run
augur-keyman-1 | new_key = self.new_key(request["key_platform"])
augur-keyman-1 | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
augur-keyman-1 | File "/augur/keyman/Orchestrator.py", line 102, in new_key
augur-keyman-1 | raise InvalidRequest(f"Invalid platform: {platform}")
augur-keyman-1 | keyman.KeyOrchestrationAPI.InvalidRequest: Invalid platform: github_rest

```

this was observed when bringing augur back up after deleting some files as a temporary remediaton of #219