fix: Add tracing settings loading from runtime_settings.json (#9081)

Tracing settings (EnableTracing and TracingMaxItems) were not being
loaded from runtime_settings.json on startup, causing tracing settings
configured via WebUI to be lost after service restart.

This fix adds proper loading of tracing settings in
loadRuntimeSettingsFromFile function in core/application/startup.go.

Fixes #9072

Co-authored-by: localai-bot <localai-bot@localai.io>

Author: localai-bot

core/application/startup.go

@@ -432,6 +432,18 @@ func loadRuntimeSettingsFromFile(options *config.ApplicationConfig) {
 		}
 	}
 
+	// Tracing settings
+	if settings.EnableTracing != nil {
+		if !options.EnableTracing {
+			options.EnableTracing = *settings.EnableTracing
+		}
+	}
+	if settings.TracingMaxItems != nil {
+		if options.TracingMaxItems == 0 {
+			options.TracingMaxItems = *settings.TracingMaxItems
+		}
+	}
+
 	xlog.Debug("Runtime settings loaded from runtime_settings.json")
 }