HYPERFLEET-1097 - fix: update vendor label to "Red Hat, Inc."

EC requires vendor="Red Hat, Inc." not "Red Hat".

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

Author: ciaranRoche

Dockerfile

@@ -54,7 +54,7 @@ CMD ["serve"]
 
 ARG APP_VERSION="0.0.0-dev"
 LABEL name="hyperfleet-api" \
-      vendor="Red Hat" \
+      vendor="Red Hat, Inc." \
       version="${APP_VERSION}" \
       summary="HyperFleet API - Cluster Lifecycle Management Service" \
       description="HyperFleet API for cluster lifecycle management"