feat: implement MoloApp plans 01-15 with integration

Full C++23 framework tree: runtime, observability, security,
data, app, realtime, supervisor, clients, CLI, example plus
enterprise tenancy, audit, operability, governance,
supplychain. Postgres via docker compose for tests.

tests/example/embedded/assets_test.cpp

@@ -0,0 +1,16 @@
+// Route: GET /embedded/{name}  (embedded C++ assets)
+#include "support/Assert.hpp"
+
+using namespace molo::example::test;
+
+int main() {
+  Fixture f;
+  auto res = f.client->get("/embedded/hello.txt");
+  check(res.status == 200, "status 200");
+  check(res.headers.get("X-Asset-Source") == "embedded",
+        "served from embedded bundle");
+  check(contains(res.body, "embedded assets"), "bundle content served");
+  auto missing = f.client->get("/embedded/nope.txt");
+  check(missing.status == 404, "missing asset is 404");
+  return finish("embedded/assets");
+}