Annotate noexcept and constexpr with HEDLEY, and add interval containment, ChaCha, and the dyadic range tables.

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

test/tests/beaver_test.cpp

@@ -1552,3 +1552,26 @@ TEST(Beaver, RejectsBadUse)
     EXPECT_THROW((void)[&] { return a.bit_mul(x, x); }(), std::invalid_argument);
     (void)z;
 }
+
+TEST(Beaver, ProductExtremes)
+{
+    const std::tuple<u64, u64, u64> cases[] = {
+        {0ull, 5ull, 0ull},
+        {7ull, 0ull, 0ull},
+        {~u64{0}, ~u64{0}, 1ull},
+        {1ull, ~u64{0}, ~u64{0}},
+    };
+    for (const auto & [a, b, want] : cases)
+    {
+        session64 s;
+        auto x = s.input();
+        auto y = s.input();
+        auto z = s(x * y);
+        Counter rng;
+        s.sample(rng);
+        s.bind(x, a, rng);
+        s.bind(y, b, rng);
+        s.evaluate();
+        EXPECT_EQ(s.open(z), want) << a << " * " << b;
+    }
+}