feat(server): enforce rate and session lifetime

crates/irtt-server/src/tests/mod.rs

@@ -15,10 +15,12 @@ mod admission;
 mod close;
 mod echo;
 mod hmac;
+mod lifecycle;
 mod negotiation;
 mod no_test;
 mod open;
 mod params;
+mod rate;
 mod sessions;
 mod support;
 mod tokens;