Fix: Raise nginx ingress body size limit to 52m for image uploads

Default client_max_body_size of 1MB was rejecting uploads larger than 1MB
with a 413 before the request reached the API.

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

k8s/ingress.yaml

@@ -7,6 +7,7 @@ metadata:
     cert-manager.io/cluster-issuer: letsencrypt-prod
     kubernetes.io/tls-acme: "true"
     nginx.ingress.kubernetes.io/ssl-redirect: "true"
+    nginx.ingress.kubernetes.io/proxy-body-size: "52m"
 spec:
   ingressClassName: nginx-public
   tls: