bump hbb_common: name the punch by every transport it carries

`get_local_endpoint_trickle` became `local_endpoint() -> &str`, which
cannot fail, so both call sites lose an unreachable error arm — the
mediator's closed a pc against a failure that no longer exists.

`punch_type` named one transport, and picked it off `allow_tcp_punch`.
A round carries several at once — a NAT port and a v6 address and an
offer — and since the TCP punch became a switch it can carry none, so
one name had to misreport both: the logs of the round that broke WebRTC
read "#1 UDP punch attempt" while the request also carried the v6
address and the offer that was actually failing, and a round with
nothing to punch with was labelled "WebRTC". List them instead —
"UDP+IPv6+WebRTC" — and call the empty round "Relay", which is what it
can still end as and what `typ` prints for it.

The offer is moved into the request rather than cloned into it; that
was its last use.

Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_019UzcMTdYTEv2QbMHcTSUy3

src/rendezvous_mediator.rs

@@ -700,14 +700,7 @@ impl RendezvousMediator {
     ) -> ResultType<String> {
         let mut stream =
             WebRTCStream::new(&ph.webrtc_sdp_offer, relay_only_ice, CONNECT_TIMEOUT).await?;
-        let answer = match stream.get_local_endpoint_trickle().await {
-            Ok(answer) => answer,
-            Err(e) => {
-                // Close the freshly-created pc so a failure here doesn't leak it in SESSIONS.
-                stream.close().await;
-                return Err(e);
-            }
-        };
+        let answer = stream.local_endpoint().to_owned();
         let session_key = stream.session_key().to_owned();
         let return_route = ph.socket_addr.clone();