feat(compute): Worker-Selbstanmeldung ueber RVS + Flotten-Anzeige (Stage 2)

Jeder GPU-Dienst meldet sich beim Connect mit worker_hello {instanceId,
service, node, gpus, model} und haelt die Registry per periodischem
worker_ping {instanceId, busy} (~10s) frisch. So weiss ARIA, was wo laeuft.

- xtts/{voxtral,whisper,f5tts}/bridge.py + llm-adapter/adapter.py:
  INSTANCE_ID=service@NODE_NAME, _worker_register()-Coroutine (hello + ping),
  busy-Quelle je Worker (aktive STT-Sessions / TTS-Render / in-flight LLM);
  Task sauber gecancelt bei Reconnect.
- bridge/aria_bridge.py: self._workers-Registry + Handler worker_hello/
  worker_ping (spiegelt sat_hello), _worker_list() (35s-Offline-TTL),
  _pick_worker() (Round-Robin freie Instanz, fuer Stage-3-Routing),
  /internal/worker-list-Endpoint.
- diagnostic/server.js: workers-Map, worker_hello/worker_ping-Tracking,
  worker_update-Broadcast + worker_list-Action + on-connect-Snapshot.
- diagnostic/index.html: "Compute-Flotte"-Panel im Satelliten-Tab — pro Node
  gruppiert, mit Dienst/Modell/GPU und frei/beschaeftigt/offline-Status.

Stage 2 von 3. Reine Sichtbarkeit, kein Routing-Verhalten geaendert.

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

diagnostic/server.js

@@ -490,6 +490,24 @@ function broadcastSatellites() {
   broadcast({ type: "sat_update", satellites: satelliteList() });
 }
 
+// ── Compute-Fleet: GPU-Worker (voxtral/whisper/f5tts/llm) ──────────
+// Worker melden sich per worker_hello + halten sich per worker_ping (busy) frisch.
+const workers = new Map(); // instanceId → {instanceId, service, node, gpus, model, busy, last_seen}
+const WORKER_OFFLINE_MS = 35000; // ping ~10s; nach 35s ohne Ping = offline
+
+function workerList() {
+  const now = Date.now();
+  return Array.from(workers.values()).map(w => ({
+    instanceId: w.instanceId, service: w.service, node: w.node,
+    gpus: w.gpus, model: w.model, busy: !!w.busy,
+    online: (now - (w.last_seen || 0)) < WORKER_OFFLINE_MS,
+  }));
+}
+
+function broadcastWorkers() {
+  broadcast({ type: "worker_update", workers: workerList() });
+}
+
 // ── OpenClaw Gateway Verbindung ─────────────────────────
 
 async function connectGateway() {
@@ -935,6 +953,32 @@ function connectRVS(forcePlain) {
         if (p.satellite && satellites.has(p.satellite)) satellites.get(p.satellite).last_seen = Date.now();
         broadcast({ type: "sat_devices", satellite: p.satellite || "",
                     location: p.location || "", devices: p.devices || [] });
+      } else if (msg.type === "worker_hello") {
+        // Ein Compute-Worker (GPU-Dienst) meldet sich mit seiner Identitaet.
+        const p = msg.payload || {};
+        if (p.instanceId) {
+          const prev = workers.get(p.instanceId) || {};
+          workers.set(p.instanceId, {
+            instanceId: p.instanceId, service: p.service || "",
+            node: p.node || "", gpus: p.gpus || "", model: p.model || "",
+            busy: !!prev.busy, last_seen: Date.now(),
+          });
+          broadcastWorkers();
+        }
+      } else if (msg.type === "worker_ping") {
+        // Heartbeat eines Workers (traegt busy-Status).
+        const p = msg.payload || {};
+        if (p.instanceId) {
+          let w = workers.get(p.instanceId);
+          if (!w) {
+            const svc = String(p.instanceId).split("@")[0];
+            w = { instanceId: p.instanceId, service: svc, node: "", gpus: "", model: "", busy: false, last_seen: 0 };
+            workers.set(p.instanceId, w);
+          }
+          w.busy = !!p.busy;
+          w.last_seen = Date.now();
+          broadcastWorkers();
+        }
       } else if (msg.type === "agent_activity") {
         // Bridge meldet "ARIA denkt/schreibt/tool" oder "idle" — an Browser
         // weiterreichen, damit der Thinking-Indikator im Chat erscheint.
@@ -2505,6 +2549,8 @@ wss.on("connection", (ws) => {
   if (currentDiskStatus) ws.send(JSON.stringify(currentDiskStatus));
   // Aktuell bekannte Satelliten mitgeben (RVS replayt sat_hello nicht).
   ws.send(JSON.stringify({ type: "sat_update", satellites: satelliteList() }));
+  // Aktuell bekannte Compute-Worker mitgeben (RVS replayt worker_hello nicht).
+  ws.send(JSON.stringify({ type: "worker_update", workers: workerList() }));
 
   ws.on("message", (raw) => {
     try {
@@ -2536,6 +2582,9 @@ wss.on("connection", (ws) => {
       } else if (msg.action === "sat_list") {
         // Browser will die aktuelle Satelliten-Liste.
         ws.send(JSON.stringify({ type: "sat_update", satellites: satelliteList() }));
+      } else if (msg.action === "worker_list") {
+        // Browser will die aktuelle Compute-Flotte.
+        ws.send(JSON.stringify({ type: "worker_update", workers: workerList() }));
       } else if (msg.action === "sat_discover") {
         // Browser triggert einen Geraete-Scan auf einem Satelliten.
         sendToRVS_raw({ type: "sat_discover",