deploy DHARMA registry to neuron-prod

- Dockerfile for Go DHARMA server (registry.neuralplatform.ai/neuron-technologies/dharma)
- k8s manifests: deployment, service, ExternalSecret (Vault), IngressRoute
- Argo CD app: deploys to neuron-prod namespace
- Cloudflare tunnel rule for dharma.neurontechnologies.ai
- DNS CNAME record for dharma.neurontechnologies.ai → legion tunnel
- Vault secrets already populated (api_key, encryption_key, jwt_secret, engram_key, engram_url)
- Connects to neuron-daemon (engram) at neuron-daemon.neuron-prod.svc.cluster.local:7749

servers/legion/apps/dharma.yaml

@@ -0,0 +1,20 @@
+apiVersion: argoproj.io/v1alpha1
+kind: Application
+metadata:
+  name: dharma
+  namespace: argocd
+spec:
+  project: neuron-prod
+  source:
+    repoURL: http://gitea.git.svc.cluster.local:3000/will/infrastructure.git
+    targetRevision: main
+    path: servers/legion/k8s/neuron-technologies/dharma
+  destination:
+    server: https://kubernetes.default.svc
+    namespace: neuron-prod
+  syncPolicy:
+    automated:
+      prune: true
+      selfHeal: true
+    syncOptions:
+      - CreateNamespace=false