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

16 routes: Office (single key, full CRUD + employees sub-resource)
and Employee (single key, full CRUD + reports + customers
sub-resources). MCP layer built with the single-route pattern from
the start.

Only domain where customer role has zero access — verified against
ReferenceDataPermission.check(): read_only/product_manager/support
get reads, writes are admin-only, customer isn't in the allow-list
at all. All 9 MCP tool ACLs reflect this exactly.

Keycloak (local): workforce-api-audience + mcp-workforce-audience
client scopes, resource clients, broker/librechat attachments.
Deploy key and broker secret reused/mirrored, same pattern as every
domain since payments-api.

dev/flux-kustomization.yaml

@@ -0,0 +1,32 @@
+apiVersion: kustomize.toolkit.fluxcd.io/v1
+kind: Kustomization
+metadata:
+  name: workforce-dev-api
+  namespace: workforce
+spec:
+  interval: 10m
+  sourceRef:
+    kind: GitRepository
+    name: workforce-api-dev
+  path: ./kong
+  prune: true
+  dependsOn:
+    - name: workforce-dev-api-gateway
+      namespace: flux-system
+  postBuild:
+    substitute:
+      NAME: workforce-dev
+      NAMESPACE: workforce
+      CONTROL_PLANE_REF_NAME: workforce-dev-6cq27
+      BACKEND_HOST: classic-models-api.classic-models.svc.cluster.local
+      OIDC_ISSUER: https://keycloak.sttlab.local/realms/classic-models
+      API_AUDIENCE: '["workforce-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: workforce-dev.sttlab.local
+      TOKEN_EXCHANGE_CLIENT_ID: kong-token-exchange-broker
+    substituteFrom:
+      - kind: Secret
+        name: workforce-token-exchange-broker