fix(ci): point Gitea Actions runners at public instance URL

servers/legion/k8s/gitea-runner/external-secrets.yaml

@@ -17,7 +17,13 @@ spec:
     creationPolicy: Owner
     template:
       data:
-        GITEA_INSTANCE_URL: "http://gitea.git.svc.cluster.local:3000"
+        # Public URL — the in-cluster name (gitea.git.svc.cluster.local) is
+        # not resolvable from build containers running with `network: host`,
+        # which causes `git fetch` to fail at the very first checkout step.
+        # The runner polls Gitea over Cloudflare; the latency cost is small
+        # and the build container's clone URL is derived from this instance,
+        # so it has to be a name the build container can resolve.
+        GITEA_INSTANCE_URL: "https://git.neuralplatform.ai"
         GITEA_RUNNER_REGISTRATION_TOKEN: "{{ .runner_token }}"
   data:
     - secretKey: runner_token
@@ -41,7 +47,8 @@ spec:
     creationPolicy: Owner
     template:
       data:
-        GITEA_INSTANCE_URL: "http://gitea.git.svc.cluster.local:3000"
+        # Public URL — see commentary on the gitea-runner-secret above.
+        GITEA_INSTANCE_URL: "https://git.neuralplatform.ai"
         GITEA_RUNNER_REGISTRATION_TOKEN: "{{ .runner_token }}"
   data:
     - secretKey: runner_token