Create flux/vin-decoder/ with namespace, HelmRelease, ExternalSecret, and
kustomization files mirroring the existing API Flux manifest structure.
Register vin-decoder in the root flux/kustomization.yaml so Flux picks it up.
Image automation is handled by existing flux/image-automation/ manifests
(ImageRepository and ImagePolicy for vin-decoder already present).
kustomize build flux/ passes with no errors.
Closesleeworks-agents/api-company#140