feat(runtime): add integration hardening and diagnostics

components/maze32_lobby/include/maze32_lobby.h

@@ -68,6 +68,7 @@ maze32_lobby_result_t maze32_lobby_restore(maze32_lobby_t* lobby, int connection
 void maze32_lobby_disconnect(maze32_lobby_t* lobby, int connection_id);
 maze32_lobby_result_t maze32_lobby_start(maze32_lobby_t* lobby, int connection_id, uint64_t now_ms);
 int maze32_lobby_activate_if_due(maze32_lobby_t* lobby, uint64_t now_ms);
+void maze32_lobby_reset_match(maze32_lobby_t* lobby);
 const maze32_session_t* maze32_lobby_session_for_connection(const maze32_lobby_t* lobby,
                                                             int connection_id);
 unsigned int maze32_lobby_connected_observers(const maze32_lobby_t* lobby);

components/maze32_lobby/include/maze32_protocol.h

@@ -21,6 +21,7 @@ typedef enum {
     MAZE32_MESSAGE_START,
     MAZE32_MESSAGE_MOVE,
     MAZE32_MESSAGE_DROP_KEY,
+    MAZE32_MESSAGE_RESTART,
     MAZE32_MESSAGE_HEARTBEAT,
     MAZE32_MESSAGE_SUGGEST_NAME,
 } maze32_message_type_t;

components/maze32_lobby/maze32_lobby.c

@@ -195,6 +195,16 @@ int maze32_lobby_activate_if_due(maze32_lobby_t* lobby, uint64_t now_ms) {
     return 1;
 }
 
+void maze32_lobby_reset_match(maze32_lobby_t* lobby) {
+    if (lobby == NULL) {
+        return;
+    }
+    lobby->phase = MAZE32_LOBBY_WAITING;
+    lobby->countdown_started_ms = 0U;
+    lobby->activation_ms = 0U;
+    lobby->revision++;
+}
+
 const maze32_session_t* maze32_lobby_session_for_connection(const maze32_lobby_t* lobby,
                                                             int connection_id) {
     if (lobby == NULL) {

components/maze32_lobby/maze32_protocol.c

@@ -190,6 +190,9 @@ static maze32_message_type_t message_type(const char* value) {
     if (strcmp(value, "drop_key") == 0) {
         return MAZE32_MESSAGE_DROP_KEY;
     }
+    if (strcmp(value, "restart") == 0) {
+        return MAZE32_MESSAGE_RESTART;
+    }
     if (strcmp(value, "heartbeat") == 0) {
         return MAZE32_MESSAGE_HEARTBEAT;
     }