feat(backend): scaffold PodMan agent pipeline + token server

Express server with /health and a LiveKit token endpoint. Module skeletons
for the full loop: vision (Gemini), GitHub fusion, collision detector (pure,
testable), intervention engine, and continual-learning memory store. Approve
native build scripts (esbuild/genai/protobufjs) at the workspace root.

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

package.json

@@ -25,5 +25,12 @@
     "prettier": "^3.9.0",
     "typescript": "^6.0.3",
     "typescript-eslint": "^8.62.0"
+  },
+  "pnpm": {
+    "onlyBuiltDependencies": [
+      "esbuild",
+      "@google/genai",
+      "protobufjs"
+    ]
   }
 }