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/static/files_test.cpp

@@ -0,0 +1,17 @@
+// Route: GET /static/{name}  (disk static, traversal guard)
+#include "support/Assert.hpp"
+
+using namespace molo::example::test;
+
+int main() {
+  Fixture f;
+  auto css = f.client->get("/static/app.css");
+  check(css.status == 200, "css status 200");
+  check(contains(css.headers.get("Content-Type"), "text/css"),
+        "css content type");
+  check(css.headers.has("ETag"), "etag present");
+  check(contains(css.body, "nav-narrow"), "stylesheet served");
+  auto missing = f.client->get("/static/nope.css");
+  check(missing.status == 404, "missing file is 404");
+  return finish("static/files");
+}