MC2 Final (D16 f): Voice-Metrik-Reste raus + README auf Final-Stand (C15)

f) Lucy/Voice-Reste aus dem MC2-Web-UI entfernt (kein "Sprechen"-Tab mehr):
   VoiceLatencyCard + Sprach-Latenz-Plumbing (queries/api-Typen) und der
   Backend-Leseendpoint /voice/metrics raus. Der Proaktivität-/Alarm-Kanal
   (/voice/announce, /alarm) und die STT/TTS/chat-Proxys bleiben unberührt.
C15) README auf den Final-/Autonomie-Stand aktualisiert (Mem0 statt SQLite-MCP,
   live+eingefroren, Lucy als eigenes Repo, Fangnetz-Updates/Werkstatt).

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

frontend/src/lib/queries.ts

@@ -23,7 +23,6 @@ import {
   type SystemStatus,
   type TokenStats,
   type UpdatesResp,
-  type VoiceMetrics,
 } from "./api"
 
 // Zentrale Query-Keys (eine Quelle der Wahrheit für invalidate).
@@ -35,7 +34,6 @@ export const qk = {
   groups: ["groups"] as const,
   routing: ["routing"] as const,
   routingPolicy: ["routing-policy"] as const,
-  voiceMetrics: ["voice-metrics"] as const,
   jobs: ["jobs"] as const,
   tokenStats: ["token-stats"] as const,
   agentStatus: ["agent-status"] as const,
@@ -74,9 +72,6 @@ export const useGroups = (refetchInterval = 8_000) =>
 export const useRouting = (refetchInterval = 4_000) =>
   useQuery({ queryKey: qk.routing, queryFn: () => api<RoutingResp>("/api/routing"), refetchInterval })
 
-export const useVoiceMetrics = (refetchInterval = 5_000) =>
-  useQuery({ queryKey: qk.voiceMetrics, queryFn: () => api<VoiceMetrics>("/api/voice/metrics"), refetchInterval })
-
 export const useRoutingPolicy = () =>
   useQuery({ queryKey: qk.routingPolicy, queryFn: () => api<RoutingPolicyMeta>("/api/routing/policy") })