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/supervisor/tasks_test.cpp

@@ -0,0 +1,18 @@
+// Route: /supervisor/tasks  (enqueue plus list)
+#include "support/Assert.hpp"
+
+using namespace molo::example::test;
+
+int main() {
+  Fixture f;
+  auto add = f.client->post("/supervisor/tasks",
+                            "{\"kind\":\"email\",\"payload\":\"{}\" }",
+                            "application/json");
+  check(add.status == 201, "enqueue is 201");
+  check(contains(add.body, "\"id\":\"task-"), "task id issued");
+  auto list = f.client->get("/supervisor/tasks");
+  check(contains(list.body, "task-1"), "task listed");
+  check(f.services.tasks->list().size() == 1,
+        "side effect: queue holds one");
+  return finish("supervisor/tasks");
+}