feat(api): enhance peer session management and documentation

- Added new fields to the API for tracking connected speakers and session states across multiple nodes, including `connected_speaker_id`, `connected_speaker_label`, `session_on_speakers`, `established_on_speakers`, and `session_mismatch`.
- Implemented a new endpoint for retrieving bird protocol sessions, enhancing the agent server functionality.
- Updated the OpenAPI documentation to reflect the new fields and query parameters, improving clarity for API consumers.
- Modified the frontend to display connected speaker information and session states, providing better visibility into peer connections.
- Updated deployment documentation to clarify the configuration requirements for enabling IP forwarding on VPS.

internal/httpapi/routes.go

@@ -283,13 +283,14 @@ func (s *Server) handleListPeers(w http.ResponseWriter, r *http.Request) {
 	}
 	allPeers := s.store.ListPeers(a.TenantID)
 	page, next, more := store.PaginateOffset(allPeers, r.URL.Query().Get("cursor"), parseListLimit(r))
-	liveStates := s.liveBGPProtocolStates(r)
+	fresh := r != nil && strings.EqualFold(strings.TrimSpace(r.URL.Query().Get("live")), "1")
+	ctx, cancel := context.WithTimeout(r.Context(), 12*time.Second)
+	defer cancel()
+	liveViews := s.collectSpeakerBGPLive(ctx, a.TenantID, fresh)
 	items := make([]map[string]any, 0, len(page))
 	for _, p := range page {
 		row := peerJSON(p)
-		if st, ok := liveStates[peerProtocolNameForID(p.ID)]; ok && strings.TrimSpace(st) != "" {
-			row["session_state"] = strings.TrimSpace(st)
-		}
+		applyPeerLiveFields(row, p, liveViews)
 		items = append(items, row)
 	}
 	writeJSON(w, http.StatusOK, map[string]any{
@@ -366,16 +367,9 @@ func extractBGPSessionState(line string) string {
 	return ""
 }
 
-// peerProtocolNameForID must stay in sync with pipeline peer protocol naming.
+// peerProtocolNameForID forwards to birdfmt for tests and legacy callers.
 func peerProtocolNameForID(peerID string) string {
-	s := strings.ReplaceAll(strings.TrimSpace(peerID), "-", "")
-	if len(s) > 16 {
-		s = s[:16]
-	}
-	if s == "" {
-		s = "x"
-	}
-	return "evobgp_p_" + s
+	return birdfmt.PeerProtocolName(peerID)
 }
 
 func (s *Server) handleListSpeakers(w http.ResponseWriter, r *http.Request) {