fix the random number generator seeds

related to

• !113 (merged)

this MR makes sure that the seeds given to each "strategy + scenario" loop are different by generating a bunch of unique seeds per strategy.

examples/rng.rs

+use clap::Parser;
+use rand::{rngs::StdRng, Rng, SeedableRng};
+
+#[derive(Parser)]
+#[command(version, about, long_about = None)]
+struct Cli {
+    #[arg(short)]
+    n: usize,
+
+    #[arg(long)]
+    prng_seed: u8,
+}
+
+fn main() {
+    let cli = Cli::parse();
+
+    let mut seed: [u8; 32] = [0; 32];
+    seed[0] = cli.prng_seed;
+    let mut rng = StdRng::from_seed(seed);
+
+    for _ in 0..cli.n {
+        println!("{}", rng.gen::<u8>());
+    }
+}