Documents the SSH-free third migration path on top of the device's diagnostic
shell, synthesised from #221, #236, scheilch/opencloudtouch#167,
deborahgu/soundcork#228, and deborahgu/soundcork#141.
Captures the URL configuration command sequence, the dual persistence layers
(`sys configuration` + `envswitch boseurls set`), the `/setMargeAccount`
failure modes (404, hang, post-migration 502 on power_on) with their bounded
fallbacks, port-17000 preflight requirements, and account-ID sourcing rules
(reuse from `:8090/info`, pick from `DataStore.ListAccounts`, or 7-digit
manual/randomized entry). Cross-links the new doc from
DEVICE-REDIRECT-METHODS.md, marks the `/etc/hosts` method as deprecated, and
fixes the existing margeServerUrl example to use our service's bare-URL
convention with an explicit note for soundcork's `/marge` sub-path.
Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
Tobias GesellchenandClaude Opus 4.7