feat(foundry): productionize Cesium Map Page and platform runtime

server/runtime-entrypoint.mjs

@@ -0,0 +1,9 @@
+import { spawn } from "node:child_process";
+
+await import("./runtime-seed.mjs");
+
+const [command, ...args] = process.argv.slice(2);
+if (!command) throw new Error("foundry_runtime_command_required");
+const child = spawn(command, args, { stdio: "inherit" });
+child.on("exit", (code, signal) => process.exitCode = code ?? (signal ? 1 : 0));
+child.on("error", (error) => { throw error; });