infra(services): set replicas=0 on 9 application services — dev-mode

Persist the current dev-mode shutdown state in YAML so `kustomize build
| kubectl apply` won't quietly restart paused services.

Scope: foxhunt application services only. Core infra (GitLab, Minio,
Argo, Postgres, Redis) unchanged.

Paused:
- api, web-dashboard           (dashboard stack, not used for CLI dev)
- trading-service, trading-agent-service, broker-gateway, ib-gateway
                               (live trading — not running in dev)
- backtesting-service          (Argo workflows run standalone without it)
- data-acquisition-service     (training uses cached .fxcache, not live feed)
- ml-training-service          (training runs via scripts/argo-train.sh)

Each manifest has a restore-command comment documenting the rollback:
`kubectl -n foxhunt scale deployment <name> --replicas=1`.

infra/k8s/services/api.yaml

@@ -7,7 +7,9 @@ metadata:
     app.kubernetes.io/name: api
     app.kubernetes.io/part-of: foxhunt
 spec:
-  replicas: 1
+  # Dev-mode: paused while working on model development.
+  # Restore with: kubectl -n foxhunt scale deployment api --replicas=1
+  replicas: 0
   strategy:
     type: RollingUpdate
     rollingUpdate:

infra/k8s/services/backtesting-service.yaml

@@ -7,7 +7,9 @@ metadata:
     app.kubernetes.io/name: backtesting-service
     app.kubernetes.io/part-of: foxhunt
 spec:
-  replicas: 1
+  # Dev-mode: paused while working on model development.
+  # Restore with: kubectl -n foxhunt scale deployment backtesting-service --replicas=1
+  replicas: 0
   strategy:
     type: RollingUpdate
     rollingUpdate:

infra/k8s/services/broker-gateway.yaml

@@ -7,7 +7,9 @@ metadata:
     app.kubernetes.io/name: broker-gateway
     app.kubernetes.io/part-of: foxhunt
 spec:
-  replicas: 1
+  # Dev-mode: paused while working on model development.
+  # Restore with: kubectl -n foxhunt scale deployment broker-gateway --replicas=1
+  replicas: 0
   strategy:
     type: RollingUpdate
     rollingUpdate:

infra/k8s/services/data-acquisition-service.yaml

@@ -7,7 +7,9 @@ metadata:
     app.kubernetes.io/name: data-acquisition-service
     app.kubernetes.io/part-of: foxhunt
 spec:
-  replicas: 1
+  # Dev-mode: paused while working on model development.
+  # Restore with: kubectl -n foxhunt scale deployment data-acquisition-service --replicas=1
+  replicas: 0
   strategy:
     type: RollingUpdate
     rollingUpdate:

infra/k8s/services/ib-gateway.yaml

@@ -7,7 +7,9 @@ metadata:
     app: ib-gateway
     app.kubernetes.io/part-of: foxhunt
 spec:
-  replicas: 1
+  # Dev-mode: paused while working on model development.
+  # Restore with: kubectl -n foxhunt scale deployment ib-gateway --replicas=1
+  replicas: 0
   strategy:
     type: Recreate
   selector:

infra/k8s/services/ml-training-service.yaml

@@ -49,7 +49,10 @@ metadata:
     app.kubernetes.io/name: ml-training-service
     app.kubernetes.io/part-of: foxhunt
 spec:
-  replicas: 1
+  # Dev-mode: paused while working on model development.
+  # Training runs via Argo workflows (scripts/argo-train.sh) — this HTTP service is not required.
+  # Restore with: kubectl -n foxhunt scale deployment ml-training-service --replicas=1
+  replicas: 0
   strategy:
     type: RollingUpdate
     rollingUpdate:

infra/k8s/services/trading-agent-service.yaml

@@ -7,7 +7,9 @@ metadata:
     app.kubernetes.io/name: trading-agent-service
     app.kubernetes.io/part-of: foxhunt
 spec:
-  replicas: 1
+  # Dev-mode: paused while working on model development.
+  # Restore with: kubectl -n foxhunt scale deployment trading-agent-service --replicas=1
+  replicas: 0
   strategy:
     type: RollingUpdate
     rollingUpdate:

infra/k8s/services/trading-service.yaml

@@ -7,7 +7,9 @@ metadata:
     app.kubernetes.io/name: trading-service
     app.kubernetes.io/part-of: foxhunt
 spec:
-  replicas: 1
+  # Dev-mode: paused while working on model development.
+  # Restore with: kubectl -n foxhunt scale deployment trading-service --replicas=1
+  replicas: 0
   strategy:
     type: RollingUpdate
     rollingUpdate:

infra/k8s/services/web-dashboard.yaml

@@ -7,7 +7,9 @@ metadata:
     app.kubernetes.io/name: web-dashboard
     app.kubernetes.io/part-of: foxhunt
 spec:
-  replicas: 1
+  # Dev-mode: paused while working on model development.
+  # Restore with: kubectl -n foxhunt scale deployment web-dashboard --replicas=1
+  replicas: 0
   strategy:
     type: RollingUpdate
     rollingUpdate: