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/health_test.cpp

@@ -0,0 +1,26 @@
+// Route: GET /health  (probe plus real-HTTP loopback round-trip)
+#include "support/Assert.hpp"
+
+#include "fw/Server.hpp"
+
+using namespace molo::example::test;
+
+int main() {
+  Fixture f;
+  auto res = f.client->get("/health");
+  check(res.status == 200, "status 200");
+  check(contains(res.body, "\"status\":\"ok\""), "ok body");
+
+  molo::example::fw::Server server(f.app);
+  check(server.start("127.0.0.1", 0), "loopback server starts");
+  std::string wire = molo::example::fw::http_roundtrip(
+      "127.0.0.1", server.port(),
+      "GET /health HTTP/1.1\r\nHost: x\r\nConnection: close\r\n\r\n");
+  check(contains(wire, "200 OK"), "real HTTP status line");
+  check(contains(wire, "\"status\":\"ok\""), "real HTTP body");
+  server.stop();
+
+  auto missing = f.client->get("/no-such-route");
+  check(missing.status == 404, "unknown route is 404");
+  return finish("health");
+}