step 9: single image CI/CD, drop FE/BE split

CI pipeline: replace separate FE + BE image builds with single unified
Dockerfile. Remove FE_IMAGE, FE_REPLICAS, FE_* resource vars. Simplify
build/push/deploy to single IMAGE. Remove frontend.yaml k8s manifest.
Remove provider integration test env vars (PROVIDER, PROVIDER_KEY,
VENICE_API_KEY). Remove EXTRACTION_CONCURRENCY.

Delete server/Dockerfile (backend-only image, superseded by root
Dockerfile). Delete k8s/frontend.yaml (no separate FE deployment).

Update ROADMAP: steps 5-7 and 9 marked complete. Step 8 (ICD) partial.
Step 10 (smoke test + tag) is all that remains for v0.1.0.

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

k8s/frontend.yaml

@@ -1,99 +0,0 @@
-# k8s/frontend.yaml
-# ============================================
-# Switchboard Core - Frontend Deployment
-# ============================================
-# nginx serving the SPA + proxying page routes
-# to the backend for Go template rendering.
-#
-# v0.22.6+: BACKEND_URL enables proxy_pass for
-# /, /login, /admin, /editor, /notes, /settings.
-# ============================================
-apiVersion: apps/v1
-kind: Deployment
-metadata:
-  name: switchboard-fe${DEPLOY_SUFFIX}
-  namespace: ${NAMESPACE}
-  labels:
-    app: switchboard
-    component: frontend
-    env: ${ENVIRONMENT}
-spec:
-  replicas: ${FE_REPLICAS}
-  selector:
-    matchLabels:
-      app: switchboard
-      component: frontend
-      env: ${ENVIRONMENT}
-  template:
-    metadata:
-      labels:
-        app: switchboard
-        component: frontend
-        env: ${ENVIRONMENT}
-    spec:
-      containers:
-      - name: frontend
-        image: ${FE_IMAGE}:${IMAGE_TAG}
-        imagePullPolicy: Always
-        ports:
-        - containerPort: 80
-          name: http
-        env:
-        - name: BASE_PATH
-          value: "${BASE_PATH}"
-        - name: ENVIRONMENT
-          value: "${ENVIRONMENT}"
-        - name: BACKEND_URL
-          value: "http://switchboard-be${DEPLOY_SUFFIX}:8080"
-        volumeMounts:
-        - name: branding
-          mountPath: /branding
-          readOnly: true
-        resources:
-          requests:
-            memory: "${FE_MEMORY_REQUEST}"
-            cpu: "${FE_CPU_REQUEST}"
-          limits:
-            memory: "${FE_MEMORY_LIMIT}"
-            cpu: "${FE_CPU_LIMIT}"
-        readinessProbe:
-          httpGet:
-            path: /healthz
-            port: 80
-          initialDelaySeconds: 3
-          periodSeconds: 10
-          timeoutSeconds: 3
-          failureThreshold: 3
-        livenessProbe:
-          httpGet:
-            path: /healthz
-            port: 80
-          initialDelaySeconds: 5
-          periodSeconds: 30
-          timeoutSeconds: 5
-          failureThreshold: 3
-      volumes:
-      - name: branding
-        configMap:
-          name: switchboard-branding
-          optional: true
----
-apiVersion: v1
-kind: Service
-metadata:
-  name: switchboard-fe${DEPLOY_SUFFIX}
-  namespace: ${NAMESPACE}
-  labels:
-    app: switchboard
-    component: frontend
-    env: ${ENVIRONMENT}
-spec:
-  selector:
-    app: switchboard
-    component: frontend
-    env: ${ENVIRONMENT}
-  ports:
-  - protocol: TCP
-    port: 80
-    targetPort: 80
-    name: http