Checkpoint the party/runtime stack before share-program and malicious-mode work.

Ship the TLS mesh, composer, Beaver/Yao/leaf MPC, prep/online paths, apps, and docs so the tree is pushable before elevating share_expr, security_mode, and prep resume.

Co-authored-by: Cursor <cursoragent@cursor.com>

examples/output_types/gf2.cpp

@@ -0,0 +1,10 @@
+#include <iostream>
+#include "dpf.hpp"
+
+int main()
+{
+    auto [k0, k1] = dpf::make_dpf(std::uint8_t{3}, dpf::gf28{0x1b});
+    auto y0 = *dpf::eval_point(k0, std::uint8_t{3});
+    auto y1 = *dpf::eval_point(k1, std::uint8_t{3});
+    std::cout << dpf::reconstruct(y0, y1) << "\n";
+}