fix: explicitly cast rmp::AnnealingStrategy::random_'s seed to 32-bit

`rmp::AnnealingStrategy::random_` is `std::mt19937` which is 32-bit: https://en.cppreference.com/w/cpp/numeric/random/mersenne_twister_engine.html

This in turn causes the constructor for `AnnealingStrategy` to be ill-formed according to the C++17 standard:

> List-initialization of an object or reference of type T is defined as follows:

> ...

> (3.7) Otherwise, if T is a class type, constructors are considered. The applicable constructors are enumerated and the best one is chosen through overload resolution (16.3, 16.3.1.7). If a narrowing conversion (see below) is required to convert any of the arguments, the program is ill-formed.

As the seed is `uint64_t` and `mt19937` uses `uint32_t`, this is a narrowing conversion that fails to compile on at least Darwin. This is the solution that probably causes the least amount of surprises.

Signed-off-by: Mohamed Gaber <me@donn.website>

Author: donn

src/rmp/src/annealing_strategy.h

@@ -34,7 +34,8 @@ class AnnealingStrategy : public ResynthesisStrategy
         initial_ops_(initial_ops)
   {
     if (seed) {
-      random_ = decltype(random_){*seed};
+      const uint32_t seed_32 = *seed;
+      random_ = decltype(random_){seed_32};
     }
   }
   void OptimizeDesign(sta::dbSta* sta,