feat: VLAN in FDB, persist vlan, enrich port-devices with hostname, UI columns

Made-with: Cursor

internal/scans/store.go

@@ -122,8 +122,10 @@ type PortDeviceResult struct {
 	IP         string    `json:"ip"`
 	IfIndex    int       `json:"if_index"`
 	BridgePort int       `json:"bridge_port,omitempty"`
+	Vlan       int       `json:"vlan"`
 	MAC        string    `json:"mac"`
 	LearnedIP  string    `json:"learned_ip"`
+	Hostname   string    `json:"hostname,omitempty"` // подставляется при ответе API по sysName скана, не хранится в БД
 	CheckedAt  time.Time `json:"checked_at"`
 }
 
@@ -419,6 +421,9 @@ func (s *MemoryStore) ListPortDeviceResults(scanID string, filterIP string, filt
 		if filtered[i].IfIndex != filtered[j].IfIndex {
 			return filtered[i].IfIndex < filtered[j].IfIndex
 		}
+		if filtered[i].Vlan != filtered[j].Vlan {
+			return filtered[i].Vlan < filtered[j].Vlan
+		}
 		if filtered[i].MAC != filtered[j].MAC {
 			return filtered[i].MAC < filtered[j].MAC
 		}