Adds license deployment, service, ingress route (/license), and
Unkey + admin token secrets via ExternalSecret. Image built and
pushed by CI on merge of neuron PR #30.
Completes the three-env setup (dev was added previously). Each env has
deployments, services, ingress, PVC, ConfigMap, and ExternalSecret pulling
from Vault. Prod has larger resource limits and 10Gi PVC. Vault secret at
secret/neuron-technologies/prod seeded separately.
Will Anderson