loginV2.required lives in the instance database, not in chart values, so
disabling the hosted Login UI in values is only half the change: the server
kept redirecting /oauth/v2/authorize to /ui/v2/login, which no longer had a
backend and returned 503.
Set loginV2.required=false in the provisioning run so the server serves its
own login page. Verified: authorize now redirects to /ui/login/login and the
page renders the "Welcome Back!" login form.
rock
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