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.

docs/remote-speakers.md

@@ -47,10 +47,22 @@ Runbook для реплик **bird2 + evobgp-agent** на отдельных VPS
 
 | Порт | Кто | Зачем |
 |------|-----|-------|
-| **443** | IP CP (`PANEL_IP_WHITELIST`) | HTTPS dispatch + health |
+| **443** | IP CP (`PANEL_IP_WHITELIST`) | HTTPS dispatch, health, **`GET /v1/agent/bird/protocols`** (live peer sessions) |
 | **179** | BGP peers | Data plane |
 | **80** | ACME | Traefik → 443 |
 
+## Подготовка VPS (перед `docker compose up`)
+
+`bird2` — **`network_mode: host`**. Docker **не может** задать `net.ipv4.ip_forward` в таком контейнере; включите на **хосте**:
+
+```bash
+sysctl -w net.ipv4.ip_forward=1
+sysctl -w net.ipv6.conf.all.forwarding=1
+echo 'net.ipv4.ip_forward=1' | tee /etc/sysctl.d/99-evobgp-bird.conf
+echo 'net.ipv6.conf.all.forwarding=1' >> /etc/sysctl.d/99-evobgp-bird.conf
+sysctl --system
+```
+
 ## Безопасность (три участка)
 
 1. **CP → реплика:** HTTPS (LE) + Traefik ipallowlist + `agent_secret`.
@@ -82,6 +94,8 @@ Tenant `/v1/settings` (`bird_bgp_source_ipv4`) — fallback для master / ес
 
 | Симптом | Проверка |
 |---------|----------|
+| `sysctl net.ipv4.ip_forward not allowed in host network` | Уберите sysctls из compose (уже так в main); включите ip_forward на VPS (см. выше) |
+| `no service selected` | `--profile production` или `COMPOSE_PROFILES=production` |
 | Offline в UI | `GET https://AGENT_DOMAIN/v1/agent/health` с CP; LE cert; whitelist |
 | dispatch error | CP logs job meta; firewall 443; `agent_secret` |
 | verify-bundle fail | pubkey совпадает с CP seed; пересоберите pubkey после смены seed |