feat: scaffold vin-decoder repo — server, data layer, Flux manifests, CI

Closes leeworks-agents/api-company#122

- openapi.yaml: copied from leeworks-agents/api-company apis/vin-decoder/openapi.yaml (canonical spec)
- src/db.js: SQLite database init with vin_cache schema and indexes
- src/nhtsa.js: NHTSA vPIC fetch + field mapping
- src/cache.js: cache read/write with 90-day TTL, validateVin, getCacheStats, evictExpired
- src/server.js: Fastify server implementing GET /v1/decode, POST /v1/batch, GET /v1/health
  - X-RapidAPI-Proxy-Secret middleware on /decode and /batch
  - X-Request-Id, X-Cache, X-Data-Source response headers
  - Returns 403 for missing/wrong proxy secret
- scripts/seed.js: pre-warm cache with known VINs, runs eviction sweep
- src/tests/cache.test.js: unit tests for validateVin + cache integration (Honda Accord VIN)
- Dockerfile: Node 20 alpine, non-root, healthcheck on /v1/health
- .gitea/workflows/ci.yaml: test → build → push to registry.leeworks.dev/vin-decoder/api:<sha>
- flux/vin-decoder/: Namespace, Deployment (with RAPIDAPI_PROXY_SECRET from secret), Service, Ingress (vin.leeworks.dev + TLS), Kustomization
- .gitignore: node_modules, data/, .env

flux/vin-decoder/deployment.yaml

@@ -0,0 +1,71 @@
+apiVersion: apps/v1
+kind: Deployment
+metadata:
+  name: vin-decoder
+  namespace: vin-decoder
+  labels:
+    app: vin-decoder
+spec:
+  replicas: 1
+  selector:
+    matchLabels:
+      app: vin-decoder
+  template:
+    metadata:
+      labels:
+        app: vin-decoder
+    spec:
+      imagePullSecrets:
+        - name: gitea-registry
+      containers:
+        - name: api
+          image: registry.leeworks.dev/vin-decoder/api:latest
+          ports:
+            - containerPort: 3000
+          env:
+            - name: PORT
+              value: "3000"
+            - name: DB_PATH
+              value: /data/vin_cache.db
+            - name: RAPIDAPI_PROXY_SECRET
+              valueFrom:
+                secretKeyRef:
+                  name: rapidapi-proxy-secret
+                  key: X-RapidAPI-Proxy-Secret
+          volumeMounts:
+            - name: data
+              mountPath: /data
+          livenessProbe:
+            httpGet:
+              path: /v1/health
+              port: 3000
+            initialDelaySeconds: 15
+            periodSeconds: 30
+          readinessProbe:
+            httpGet:
+              path: /v1/health
+              port: 3000
+            initialDelaySeconds: 5
+            periodSeconds: 10
+          resources:
+            requests:
+              cpu: 50m
+              memory: 128Mi
+            limits:
+              cpu: 500m
+              memory: 512Mi
+      volumes:
+        - name: data
+          emptyDir: {}
+---
+apiVersion: v1
+kind: Service
+metadata:
+  name: vin-decoder
+  namespace: vin-decoder
+spec:
+  selector:
+    app: vin-decoder
+  ports:
+    - port: 3000
+      targetPort: 3000

flux/vin-decoder/ingress.yaml

@@ -0,0 +1,25 @@
+apiVersion: networking.k8s.io/v1
+kind: Ingress
+metadata:
+  name: vin-decoder
+  namespace: vin-decoder
+  annotations:
+    cert-manager.io/cluster-issuer: letsencrypt-prod
+    nginx.ingress.kubernetes.io/ssl-redirect: "true"
+spec:
+  ingressClassName: nginx
+  tls:
+    - hosts:
+        - vin.leeworks.dev
+      secretName: vin-tls
+  rules:
+    - host: vin.leeworks.dev
+      http:
+        paths:
+          - path: /
+            pathType: Prefix
+            backend:
+              service:
+                name: vin-decoder
+                port:
+                  number: 3000

flux/vin-decoder/kustomization.yaml

@@ -0,0 +1,6 @@
+apiVersion: kustomize.config.k8s.io/v1beta1
+kind: Kustomization
+resources:
+  - namespace.yaml
+  - deployment.yaml
+  - ingress.yaml

flux/vin-decoder/namespace.yaml

@@ -0,0 +1,4 @@
+apiVersion: v1
+kind: Namespace
+metadata:
+  name: vin-decoder