Add Sankofa consolidated hub operator tooling

.github/workflows/validate-sankofa-nginx-examples.yml

@@ -0,0 +1,25 @@
+# nginx -t on Sankofa consolidated example configs (no LAN).
+name: Validate Sankofa nginx examples
+
+on:
+  pull_request:
+    paths:
+      - 'config/nginx/sankofa-*.example.conf'
+      - 'config/nginx/sankofa-*-main.example.conf'
+      - 'scripts/verify/check-sankofa-consolidated-nginx-examples.sh'
+      - '.github/workflows/validate-sankofa-nginx-examples.yml'
+  push:
+    branches: [main, master]
+    paths:
+      - 'config/nginx/sankofa-*.example.conf'
+      - 'config/nginx/sankofa-*-main.example.conf'
+      - 'scripts/verify/check-sankofa-consolidated-nginx-examples.sh'
+      - '.github/workflows/validate-sankofa-nginx-examples.yml'
+
+jobs:
+  nginx-syntax:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v4
+      - name: nginx -t (host or Docker)
+        run: bash scripts/verify/check-sankofa-consolidated-nginx-examples.sh