test(quic): cover connection teardown

Every other QUIC test ends in std::_Exit(0), so nothing in the suite ever
ran a ~ClientQUIC. This adds 25 build-up/tear-down cycles with reader
threads parked inside RecieveSync -- the shape a reconnect loop has --
which aborts on ~10/20 runs against the current implementation.

Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>

project.cpp

@@ -149,6 +149,7 @@ extern "C" Configuration CrafterBuildProject(std::span<const std::string_view> a
         cfg.AddTest("ShouldSendRecieveQUICDatagram").Dependencies({ &cfg });
         cfg.AddTest("ShouldSendRecieveQUICStream").Dependencies({ &cfg });
         cfg.AddTest("ShouldSurviveAbuseHTTP1").Dependencies({ &cfg });
+        cfg.AddTest("ShouldSurviveConnectionChurn").Dependencies({ &cfg });
     }
 
     return cfg;