feat(swarm): add swarm self-improvement loop infrastructure

Adds complete k8s manifests, ArgoCD app, and Terraform namespace
resources for the Neuron swarm self-improvement loop system.

Each variant (alpha, beta, gamma) gets its own isolated namespace,
PVC, MCP/REST deployments, ExternalSecrets from Vault, RBAC for CI,
and a SQLite clone Job template for session startup.

servers/legion/apps/neuron-swarm.yaml

@@ -0,0 +1,52 @@
+apiVersion: argoproj.io/v1alpha1
+kind: Application
+metadata:
+  name: neuron-swarm
+  namespace: argocd
+spec:
+  project: default
+  source:
+    repoURL: http://10.43.1.53:3000/will/infrastructure.git
+    targetRevision: main
+    path: servers/legion/k8s/neuron-technologies/swarm
+  destination:
+    server: https://kubernetes.default.svc
+    # No single namespace — resources span swarm-alpha/beta/gamma.
+    # Each resource declares its own namespace.
+    namespace: swarm-alpha
+  syncPolicy:
+    automated:
+      prune: true
+      selfHeal: true
+    syncOptions:
+      - CreateNamespace=true
+  # Don't track Jobs created dynamically by swarm.sh
+  ignoreDifferences:
+    - group: batch
+      kind: Job
+      namespace: swarm-alpha
+      jsonPointers: [""]
+    - group: batch
+      kind: Job
+      namespace: swarm-beta
+      jsonPointers: [""]
+    - group: batch
+      kind: Job
+      namespace: swarm-gamma
+      jsonPointers: [""]
+    # Session ConfigMaps are created/deleted by swarm.sh — ignore drift
+    - group: ""
+      kind: ConfigMap
+      name: swarm-alpha-session
+      namespace: swarm-alpha
+      jsonPointers: [""]
+    - group: ""
+      kind: ConfigMap
+      name: swarm-beta-session
+      namespace: swarm-beta
+      jsonPointers: [""]
+    - group: ""
+      kind: ConfigMap
+      name: swarm-gamma-session
+      namespace: swarm-gamma
+      jsonPointers: [""]