fix: use existing SSH fingerprint for dev foundation

Use the already uploaded DigitalOcean SSH key fingerprint for dev-staging so foundation bootstrap can create the node without uploading a malformed public key.

Made-with: Cursor

Author: gankoji

infra/foundation/Pulumi.dev-staging.yaml

@@ -7,12 +7,13 @@ config:
   foundation:hostname-label: dev.sprocket
   foundation:dns-prefixes: '["", "api", "vault", "traefik"]'
   foundation:admin-cidrs: '["203.0.113.10/32"]'
-  foundation:ssh-public-key: "ssh-ed25519 AAAAC3NzaC1lZDI1NTE5AAAAILGNHQoEUKZ6KLKQ7wo7p3LrBCE5XdjKxBPjtDeMH2W jacbaile@Jacobs-MacBook-Pro.local"
   foundation:create-reserved-ip: "false"
   foundation:enable-monitoring: "true"
   foundation:enable-ipv6: "true"
   foundation:tags: '["sprocket", "dev-staging", "node"]'
   foundation:deploy-user: deploy
+  foundation:ssh-key-fingerprints:
+    secure: AAABAEeqKmlZBTS3r4IqX4uyQrV/3R3RLzh/w8NEXId5b8lKLU0pVmG5ZIXQ8gqlP/suSk+ajihc2PBx9iyCDUtr29bZ2xs/lLbKcaSTFg==
 
 # Optional cluster growth / network controls
 # foundation:swarm-cidrs: '["10.0.0.0/8"]'