fix: Set unique ingress hostnames for local Kind clusters

[ruokun-niu]

Description

In local Kind clusters without LoadBalancer IPs, ingress resources had no host field set, causing all ingresses to become catch-all routes. Multiple reactions routed to the last created ingress regardless of hostname.

Solution:

• Enhanced CLI --local-cluster flag to auto-set --ingress-ip-address 127.0.0.1 for nip.io DNS
• Updated the kind config file
• Modified reconciler.rs to always generate unique hostnames (uses localhost suffix when external IP unavailable)
• Updated e2e SignalR fixture to use 127.0.0.1.nip.io hostname format

Let's say we have the following reactions deployed:

  drasi list reaction
            ID          | AVAILABLE |                    INGRESS URL                    | MESSAGES
  ----------------------+-----------+---------------------------------------------------+-----------
    hello-world-debug-2 | true      | http://hello-world-debug-2.drasi.127.0.0.1.nip.io |
    hello-world-debug   | true      | http://hello-world-debug.drasi.127.0.0.1.nip.io   |

There are two ways to access the ingress:

Option 1: Using Kind extraPortMappings (Recommended)

Configure your Kind cluster with port mappings in kind-config.yaml:

  kind: Cluster
  apiVersion: kind.x-k8s.io/v1alpha4
  nodes:
  - role: control-plane
    extraPortMappings:
    - containerPort: 30080  # Maps to Contour NodePort 30080
      hostPort: 8001
      listenAddress: "0.0.0.0"
    - containerPort: 30443  # Maps to Contour NodePort 30443
      hostPort: 443
      listenAddress: "0.0.0.0"

Access in browser:
http://hello-world-debug.drasi.127.0.0.1.nip.io:8001
http://hello-world-debug-2.drasi.127.0.0.1.nip.io:8001

Option 2: Using kubectl port-forward

Forward the Contour service to localhost:

kubectl port-forward -n projectcontour svc/contour-envoy 8080:80

Then add entries to /etc/hosts:
echo "127.0.0.1 hello-world-debug.drasi.127.0.0.1.nip.io" | sudo tee -a /etc/hosts
echo "127.0.0.1 hello-world-debug-2.drasi.127.0.0.1.nip.io" | sudo tee -a /etc/hosts

Access in browser:
http://hello-world-debug.drasi.127.0.0.1.nip.io:8080
http://hello-world-debug-2.drasi.127.0.0.1.nip.io:8080

Alternative - using curl with Host header (no /etc/hosts needed):
curl http://localhost:8080 -H "Host: hello-world-debug.drasi.127.0.0.1.nip.io"
curl http://localhost:8080 -H "Host: hello-world-debug-2.drasi.127.0.0.1.nip.io"

Type of change

• This pull request fixes a bug in Drasi and has an approved issue (issue link required).
• This pull request adds or changes features of Drasi and has an approved issue (issue link required).
• This pull request is a minor refactor, code cleanup, test improvement, or other maintenance task and doesn't change the functionality of Drasi (issue link optional).

Fixes: #323