Add harness app: agent orchestrator with cluster deployment

- Next.js app for orchestrating coding agent benchmarks (Claude Code, Codex, OpenCode)
- Dockerfile installs git, gh CLI, and agent CLIs for headless execution
- K8s deployment with workspace volume, sealed credentials for Claude + OpenCode
- Traefik IngressRoute at harness.coreworlds.io with internal-only middleware + TLS
- CI pipeline path filter for harness builds
- Fix OpenCode runtime flags (subcommand-based headless mode)

pnpm-lock.yaml

@@ -70,6 +70,34 @@ importers:
         specifier: ^5.7.0
         version: 5.9.3
 
+  apps/harness:
+    dependencies:
+      next:
+        specifier: ^15.1.0
+        version: 15.5.14(@opentelemetry/api@1.9.0)(react-dom@19.2.4(react@19.2.4))(react@19.2.4)
+      react:
+        specifier: ^19.0.0
+        version: 19.2.4
+      react-dom:
+        specifier: ^19.0.0
+        version: 19.2.4(react@19.2.4)
+      yaml:
+        specifier: ^2.7.0
+        version: 2.8.2
+    devDependencies:
+      '@types/node':
+        specifier: ^22.10.0
+        version: 22.19.15
+      '@types/react':
+        specifier: ^19.0.0
+        version: 19.2.14
+      '@types/react-dom':
+        specifier: ^19.0.0
+        version: 19.2.3(@types/react@19.2.14)
+      typescript:
+        specifier: ^5.7.0
+        version: 5.9.3
+
   apps/web:
     dependencies:
       '@tailwindcss/postcss':