Build sales-api REST + MCP layers (Layer 3), full build in one pass

14 routes: Order (single key, full CRUD + order-details sub-resource)
and Orderdetail (composite key ordernumber+productcode, own
top-level resource, mirrors backend's own URL structure). MCP layer
built with the corrected single-route pattern from the start
(STATUS.md section 18) — 7 tools, list/get read-only for all 5
roles, create-order/create-orderdetail for admin+customer+support
(verified against OrderPermission/OrderScopedPermission.check() —
support gets an unconditional class-level pass, the status-only
restriction is object-level and doesn't apply to create).

Keycloak (local): sales-api-audience + mcp-sales-audience client
scopes, sales-api + mcp-sales resource clients, attached to the
broker and librechat respectively. Deploy key and broker secret
reused/mirrored from catalog-api and the live broker client, same
pattern as customers-api/payments-api.

dev/externalsecret.yaml

@@ -0,0 +1,25 @@
+apiVersion: external-secrets.io/v1
+kind: ExternalSecret
+metadata:
+  name: sales-api-git-auth
+  namespace: sales
+spec:
+  refreshInterval: 1h
+  secretStoreRef:
+    kind: ClusterSecretStore
+    name: vault-kong-v2
+  target:
+    name: sales-api-git-auth
+  data:
+    - secretKey: identity
+      remoteRef:
+        key: kong-v2/sales-api/git-deploy-key
+        property: identity
+    - secretKey: identity.pub
+      remoteRef:
+        key: kong-v2/sales-api/git-deploy-key
+        property: identity.pub
+    - secretKey: known_hosts
+      remoteRef:
+        key: kong-v2/sales-api/git-deploy-key
+        property: known_hosts

dev/flux-kustomization.yaml

@@ -0,0 +1,32 @@
+apiVersion: kustomize.toolkit.fluxcd.io/v1
+kind: Kustomization
+metadata:
+  name: sales-dev-api
+  namespace: sales
+spec:
+  interval: 10m
+  sourceRef:
+    kind: GitRepository
+    name: sales-api-dev
+  path: ./kong
+  prune: true
+  dependsOn:
+    - name: sales-dev-api-gateway
+      namespace: flux-system
+  postBuild:
+    substitute:
+      NAME: sales-dev
+      NAMESPACE: sales
+      CONTROL_PLANE_REF_NAME: sales-dev-pjdc7
+      BACKEND_HOST: classic-models-api.classic-models.svc.cluster.local
+      OIDC_ISSUER: https://keycloak.sttlab.local/realms/classic-models
+      API_AUDIENCE: '["sales-api"]'
+      BACKEND_AUDIENCE: '["classic-models-api"]'
+      BACKEND_SCOPES: '[]'
+      API_RATE_LIMIT_MINUTE: "60"
+      AUDIT_LOG_ENDPOINT: http://audit-log-collector.observability.svc.cluster.local/logs
+      REST_HOSTNAME: sales-dev.sttlab.local
+      TOKEN_EXCHANGE_CLIENT_ID: kong-token-exchange-broker
+    substituteFrom:
+      - kind: Secret
+        name: sales-token-exchange-broker

dev/gitrepository.yaml

@@ -0,0 +1,12 @@
+apiVersion: source.toolkit.fluxcd.io/v1
+kind: GitRepository
+metadata:
+  name: sales-api-dev
+  namespace: sales
+spec:
+  interval: 5m
+  url: ssh://git@gitea.sttlab.eu:2222/stt/kong-sales-api.git
+  secretRef:
+    name: sales-api-git-auth
+  ref:
+    branch: main

dev/token-exchange-broker-externalsecret.yaml

@@ -0,0 +1,17 @@
+apiVersion: external-secrets.io/v1
+kind: ExternalSecret
+metadata:
+  name: sales-token-exchange-broker
+  namespace: sales
+spec:
+  refreshInterval: 1h
+  secretStoreRef:
+    kind: ClusterSecretStore
+    name: vault-kong-v2
+  target:
+    name: sales-token-exchange-broker
+  data:
+    - secretKey: TOKEN_EXCHANGE_CLIENT_SECRET
+      remoteRef:
+        key: kong-v2/sales-api/token-exchange-broker
+        property: client_secret