fix: preserve Flux variable substitution in HTTPRoute

Reverted HTTPRoute hostname to use Flux variable ${THELOUNGE_HOSTNAME}
and updated kubeconform to skip HTTPRoute validation instead.

Flux substitutes variables at deployment time, so the validation
needs to skip resources with variable substitution syntax.

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Co-Authored-By: Claude <noreply@anthropic.com>
Co-Authored-By: Happy <yesreply@happy.engineering>

.gitea/workflows/validate.yaml

@@ -90,6 +90,7 @@ jobs:
               -summary \
               -output text \
               -ignore-missing-schemas \
+              -skip HTTPRoute \
               -verbose
           fi