otelNoIdentity points swarm.authelia.url at a remote authelia while
deploy.authelia.enable stays false, so ssoLocal is false and nothing
mkDefaults the forge's deploy.forgejo.sso.clientSecretFile. The forge
module's config is gated only on services.hyperhive.enable (there is
no deploy.forgejo.enable to opt out of), so its SSO assertion fired
against every fixture that lacks the secret — entirely orthogonal to
what this fixture tests. Supply the by-hand path, mirroring
otelRemoteAuthelia's own hand-delivered secret.
The swarm.otel.journaldUnits = [ "nginx" ] line added in the previous
commit targeted an assertion that was never firing: journaldUnits
already defaults non-empty, so the effective list just contained
"nginx" twice. Removed as redundant.
Refs #4374
065f93f037