Lua rules: increase execution limit to 500k

While 100k was plenty, it's easy to write code that accidentally goes over it.
500k should be safe to where the program does not hang indefinitely on most PCs.

src/core/tracker.cpp

@@ -94,7 +94,7 @@ static int RunLuaFunction_inner(lua_State *L, const std::string name)
         ++argc;
     }
 
-    constexpr int exec_limit = 100000;
+    constexpr int exec_limit = 500000;
     lua_sethook(L, lua_timeout_hook, LUA_MASKCOUNT, exec_limit);
     auto res = lua_pcall(L, argc, 1, -argc-2);
     lua_sethook(L, nullptr, 0, 0);