feat(api): add live status tracking for speakers and BGP sessions

- Introduced new schemas for `SpeakerLiveStatus`, `BgpSessionLive`, and `LiveSpeakerPoll` in OpenAPI documentation to support live status queries.
- Enhanced the `/v1/speakers` endpoint to include a `live` query parameter, allowing retrieval of real-time speaker and BGP status.
- Updated the HTTP API to collect and return live status data for speakers, improving monitoring capabilities.
- Modified frontend components to display live status information, enhancing user visibility into speaker health and BGP session states.
- Added a new endpoint `/v1/bird/status` for retrieving the local BIRD status, further enriching the network monitoring features.

internal/nodedispatch/dispatch.go

@@ -156,33 +156,14 @@ func WakeReplicas(ctx context.Context, st store.Backend, tenantID, revisionID st
 	return out
 }
 
-// CheckHealth GETs /v1/agent/health for UI Connected/Offline status.
+// CheckHealth is deprecated; use FetchAgentHealth.
 func CheckHealth(ctx context.Context, sp *store.Speaker, opts Options) (ok bool, detail string) {
-	if sp == nil {
-		return false, "nil speaker"
-	}
-	meta := store.ParseSpeakerMeta(sp.MetaJSON)
-	url := store.AgentHealthURL(meta)
-	if url == "" {
-		return false, "agent_domain not configured"
-	}
-	secret := strings.TrimSpace(meta.AgentSecret)
-	if secret == "" {
-		return false, "agent_secret missing"
-	}
-	req, err := http.NewRequestWithContext(ctx, http.MethodGet, url, nil)
-	if err != nil {
-		return false, err.Error()
-	}
-	req.Header.Set("Authorization", "Bearer "+secret)
-	resp, err := opts.client().Do(req)
-	if err != nil {
-		return false, err.Error()
-	}
-	defer func() { _ = resp.Body.Close() }()
-	if resp.StatusCode >= 200 && resp.StatusCode < 300 {
+	res := FetchAgentHealth(ctx, sp, opts)
+	if res.OK {
 		return true, "connected"
 	}
-	b, _ := io.ReadAll(resp.Body)
-	return false, fmt.Sprintf("HTTP %d: %s", resp.StatusCode, strings.TrimSpace(string(b)))
+	if res.Error != "" {
+		return false, res.Error
+	}
+	return false, "agent unhealthy"
 }