feat: harden podman deployment orchestration

.env.example

@@ -10,11 +10,18 @@ GEMINI_API_KEY=
 GEMINI_VISION_MODEL=gemini-2.0-flash
 GEMINI_LIVE_MODEL=gemini-live-2.5-flash
 
+# --- GitHub (repo state + sync PR artifacts) ---
+GITHUB_TOKEN=
+GITHUB_REPO=owner/name
+
 # --- MongoDB Atlas (engineer state, ownership map, events, nudges) ---
 MONGODB_URI=mongodb+srv://<user>:<pass>@cluster.mongodb.net/podman
+VOYAGE_API_KEY=
+VOYAGE_EMBEDDING_MODEL=voyage-4-lite
 
 # --- Backend server ---
 PORT=8787
+POD_ROOM=demo-pod
 
 # --- Nudge cooldown (ms) — set to 0 during demo if needed ---
 NUDGE_COOLDOWN_MS=180000
@@ -22,3 +29,7 @@ NUDGE_COOLDOWN_MS=180000
 # --- Frontend (Vite — must be VITE_ prefixed to reach the client) ---
 VITE_LIVEKIT_URL=wss://your-project.livekit.cloud
 VITE_BACKEND_URL=http://localhost:8787
+
+# --- Deployment verification ---
+# Optional override when the deployed SPA and API use different origins.
+FRONTEND_URL=http://localhost:4173