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>

xtts/f5tts/bridge.py

@@ -60,6 +60,15 @@ RVS_TOKEN = os.getenv("RVS_TOKEN", "").strip()
 # f5ttsCkptFile, f5ttsVocabFile, f5ttsCfgStrength, f5ttsNfeStep).
 F5TTS_DEVICE = os.getenv("F5TTS_DEVICE", "cuda")  # nur Bootstrap
 
+# ── Compute-Fleet: Worker-Identitaet & Registrierung ──────────────
+# Meldet sich bei der aria-bridge (worker_hello) + periodischer worker_ping.
+NODE_NAME = os.getenv("NODE_NAME", "node").strip() or "node"
+GPU_IDS = os.getenv("NVIDIA_VISIBLE_DEVICES", "").strip()
+WORKER_SERVICE = "f5tts"
+INSTANCE_ID = f"{WORKER_SERVICE}@{NODE_NAME}"
+WORKER_PING_INTERVAL_S = int(os.getenv("WORKER_PING_INTERVAL_S", "10"))
+_tts_busy = False   # True waehrend eine Synthese laeuft (busy-Report im ping)
+
 DEFAULT_F5TTS_MODEL = "F5TTS_v1_Base"
 DEFAULT_F5TTS_CKPT_FILE = ""        # leer = Default-Checkpoint von HF
 DEFAULT_F5TTS_VOCAB_FILE = ""       # leer = Default-Vocab vom Modell
@@ -460,13 +469,16 @@ _tts_queue: asyncio.Queue[tuple] = asyncio.Queue()
 
 async def _tts_worker(ws, runner: F5Runner) -> None:
     """Serialisiert Synthesen — GPU kann sonst OOM gehen."""
+    global _tts_busy
     while True:
         text, voice, request_id, message_id, language, speed = await _tts_queue.get()
+        _tts_busy = True
         try:
             await _do_tts(ws, runner, text, voice, request_id, message_id, language, speed)
         except Exception:
             logger.exception("TTS-Worker Fehler")
         finally:
+            _tts_busy = False
             _tts_queue.task_done()
 
 
@@ -808,6 +820,24 @@ async def _broadcast_status(ws, state: str, **extra) -> None:
     await _send(ws, "service_status", payload)
 
 
+async def _worker_register(ws, *, model: str = "", busy_fn=None) -> None:
+    """Meldet diesen Worker bei der aria-bridge an (worker_hello) und haelt die
+    Flotten-Registry per periodischem worker_ping (mit busy-Status) frisch."""
+    try:
+        await _send(ws, "worker_hello", {
+            "instanceId": INSTANCE_ID, "service": WORKER_SERVICE,
+            "node": NODE_NAME, "gpus": GPU_IDS, "model": model,
+        })
+        while True:
+            await asyncio.sleep(WORKER_PING_INTERVAL_S)
+            busy = bool(busy_fn()) if busy_fn else False
+            await _send(ws, "worker_ping", {"instanceId": INSTANCE_ID, "busy": busy})
+    except asyncio.CancelledError:
+        raise
+    except Exception:
+        return   # Socket tot → still beenden; run_loop reconnectet + startet neu
+
+
 async def run_loop(runner: F5Runner) -> None:
     use_tls = RVS_TLS
     retry_s = 2
@@ -855,6 +885,9 @@ async def run_loop(runner: F5Runner) -> None:
 
                 # TTS-Worker fuer diese Verbindung starten
                 worker = asyncio.create_task(_tts_worker(ws, runner))
+                ping_task = asyncio.create_task(_worker_register(
+                    ws, model=runner.model_id,
+                    busy_fn=lambda: _tts_busy or not _tts_queue.empty()))
 
                 try:
                     async for raw in ws:
@@ -958,6 +991,7 @@ async def run_loop(runner: F5Runner) -> None:
                                 _last_diag_voice = ""
                 finally:
                     worker.cancel()
+                    ping_task.cancel()
                     try:
                         await worker
                     except asyncio.CancelledError: