fix: add WithHttpTransport() for HTTP mode and add k8s manifests

HTTP transport mode was missing the required WithHttpTransport() call,
causing MapMcp() to fail. Also adds Kubernetes manifests for deployment.

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

k8s/ingress.yaml

@@ -0,0 +1,19 @@
+apiVersion: networking.k8s.io/v1
+kind: Ingress
+metadata:
+  name: paperless-mcp
+  labels:
+    app: paperless-mcp
+spec:
+  ingressClassName: traefik
+  rules:
+    - host: paperless-mcp.lan
+      http:
+        paths:
+          - path: /
+            pathType: Prefix
+            backend:
+              service:
+                name: paperless-mcp
+                port:
+                  number: 5000