refactor(tests): migrate to content-based stubbing

- Replace stbbr_for_id() with stbbr_for_query()/stbbr_send()
- Content-based stubbing matches stanzas by namespace instead of ID
- Use regex assertions for flexible output matching
- Fix timing issues in chat_session and presence tests

tests/functionaltests/test_rooms.c

@@ -4,15 +4,14 @@
 #include <string.h>
 
 #include <stabber.h>
-#include <expect.h>
 
 #include "proftest.h"
 
 void
 rooms_query(void **state)
 {
-    stbbr_for_id("prof_confreq_4",
-        "<iq id='prof_confreq_4' type='result' to='stabber@localhost/profanity' from='conference.localhost'>"
+    stbbr_for_query("http://jabber.org/protocol/disco#items",
+        "<iq id='*' type='result' to='stabber@localhost/profanity' from='conference.localhost'>"
             "<query xmlns='http://jabber.org/protocol/disco#items'>"
                 "<item jid='chatroom@conference.localhost' name='A chat room'/>"
                 "<item jid='hangout@conference.localhost' name='Another chat room'/>"
@@ -27,8 +26,8 @@ rooms_query(void **state)
     assert_true(prof_output_exact("chatroom@conference.localhost (A chat room)"));
     assert_true(prof_output_exact("hangout@conference.localhost (Another chat room)"));
 
-    assert_true(stbbr_last_received(
-        "<iq id='prof_confreq_4' to='conference.localhost' type='get'>"
+    assert_true(stbbr_received(
+        "<iq id='*' to='conference.localhost' type='get'>"
             "<query xmlns='http://jabber.org/protocol/disco#items'/>"
         "</iq>"
     ));