chore: go mod tidy / vendor / make deps

vendor/google.golang.org/grpc/internal/transport/handler_server.go

@@ -277,11 +277,13 @@ func (ht *serverHandlerTransport) writeStatus(s *ServerStream, st *status.Status
 	if err == nil { // transport has not been closed
 		// Note: The trailer fields are compressed with hpack after this call returns.
 		// No WireLength field is set here.
+		s.hdrMu.Lock()
 		for _, sh := range ht.stats {
 			sh.HandleRPC(s.Context(), &stats.OutTrailer{
 				Trailer: s.trailer.Copy(),
 			})
 		}
+		s.hdrMu.Unlock()
 	}
 	ht.Close(errors.New("finished writing status"))
 	return err

vendor/google.golang.org/grpc/internal/transport/http2_server.go

@@ -1353,10 +1353,10 @@ func (t *http2Server) closeStream(s *ServerStream, rst bool, rstCode http2.ErrCo
 	// called to interrupt the potential blocking on other goroutines.
 	s.cancel()
 
-	oldState := s.swapState(streamDone)
-	if oldState == streamDone {
-		return
-	}
+	// We can't return early even if the stream's state is "done" as the state
+	// might have been set by the `finishStream` method. Deleting the stream via
+	// `finishStream` can get blocked on flow control.
+	s.swapState(streamDone)
 	t.deleteStream(s, eosReceived)
 
 	t.controlBuf.put(&cleanupStream{