v0.8.0 - Deep health probes + auto-restart on CUDA wedge

deep_health.py:
- Synthetic probes per service, all payloads generated in-memory (BytesIO), never written to disk:
  - Parakeet: 1s of digital silence via in-memory WAV → POST /v1/audio/transcriptions
  - Magpie:   short 'hi' text → POST /v1/audio/synthesize (multipart form-data, real TTS API endpoint discovered via openapi.json)
  - vLLM:     1-token completion against currently-loaded model
- Background loop runs every 5 minutes (configurable). Best-effort: exceptions in the loop never kill it.
- Auto-restart on wedge-pattern errors (cudaErrorUnknown / CUFFT_INTERNAL_ERROR / 500 / Engine core init failed): docker restart of the affected container.
  - Rate-limited: max 3 restarts per service per 30 min.
  - Cooldown: 120 s between consecutive restarts on the same service.
  - 60 s startup grace before any auto-restart can fire after the app boots.
- Probe failures + recoveries logged via record_report(source='deep-health') into the connectivity history alongside the polling-based transitions.

API:
- GET /api/deep-health: per-service last result + auto-restart counters
- POST /api/deep-health/{service}/run: manual trigger now

UI:
- Service cards show 'Deep check ok/FAILED <time> <latency>' inline, plus a ↻ button to run-now
- Auto-restart count in 30-min window surfaced on the card when > 0
- Inline error excerpt shown for failed probes

Bug fix: server.py app startup hook was placed before the FastAPI app object was constructed (would crash on import). Moved after.

image/app/static/app.js

@@ -17,6 +17,7 @@ const state = {
   config: {},
   configured: true,
   timer_handle: null,
+  deep_health: {},
 };
 
 const el = (sel) => document.querySelector(sel);
@@ -413,6 +414,35 @@ async function renderServices() {
     const restartsRow = s.restart_count != null && s.restart_count > 1
       ? `<div class="row"><span class="k">Restarts</span><span class="v">${s.restart_count}</span></div>`
       : '';
+    const dh = state.deep_health?.[name];
+    let deepRow = '';
+    if (dh && dh.last) {
+      const last = dh.last;
+      const when = (last.at || '').slice(11, 19);  // HH:MM:SS
+      const verdict = last.ok
+        ? `<span class="dh-ok">deep check ok</span>`
+        : `<span class="dh-fail">deep check FAILED</span>`;
+      const lat = last.latency_ms != null ? ` <span class="muted">${last.latency_ms} ms</span>` : '';
+      const restarts = dh.auto_restarts_window > 0
+        ? ` <span class="muted">· ${dh.auto_restarts_window} auto-restart${dh.auto_restarts_window === 1 ? '' : 's'} in 30 min</span>`
+        : '';
+      deepRow = `
+        <div class="row deep-row">
+          <span class="k">Deep</span>
+          <span class="v deep-v">${verdict} <span class="muted small">${escapeHtml(when)}</span>${lat}${restarts}</span>
+          <button class="icon-btn dh-run-btn" data-dh-run="${escapeHtml(name)}" title="Run deep check now">↻</button>
+        </div>
+        ${last.ok ? '' : `<div class="deep-error muted small">${escapeHtml((last.error || last.note || '').slice(0, 200))}</div>`}
+      `;
+    } else if (dh) {
+      deepRow = `
+        <div class="row deep-row">
+          <span class="k">Deep</span>
+          <span class="v muted-v">no probe yet</span>
+          <button class="icon-btn dh-run-btn" data-dh-run="${escapeHtml(name)}" title="Run deep check now">↻</button>
+        </div>
+      `;
+    }
     card.innerHTML = `
       <div class="head">
         <span class="name">${escapeHtml(name)}</span>
@@ -423,6 +453,7 @@ async function renderServices() {
       ${urlRow}
       ${modelRow}
       ${restartsRow}
+      ${deepRow}
       <div class="service-actions">
         <button class="btn" data-svc-action="${name}:start" ${disable('start') ? 'disabled' : ''}>Start</button>
         <button class="btn" data-svc-action="${name}:restart" ${disable('restart') ? 'disabled' : ''}>Restart</button>
@@ -434,6 +465,25 @@ async function renderServices() {
   for (const btn of grid.querySelectorAll('.btn[data-svc-action]')) {
     btn.addEventListener('click', () => onServiceAction(btn.dataset.svcAction));
   }
+  for (const btn of grid.querySelectorAll('[data-dh-run]')) {
+    btn.addEventListener('click', () => onDeepHealthRun(btn.dataset.dhRun, btn));
+  }
+}
+
+async function onDeepHealthRun(name, btn) {
+  btn.disabled = true;
+  const orig = btn.textContent;
+  btn.textContent = '…';
+  try {
+    await fetchJSON(`/api/deep-health/${encodeURIComponent(name)}/run`, { method: 'POST' });
+  } catch (e) {
+    console.warn('deep-health run failed', e);
+  } finally {
+    try { state.deep_health = await fetchJSON('/api/deep-health'); } catch {}
+    btn.textContent = orig;
+    btn.disabled = false;
+    renderServices();
+  }
 }
 
 async function onServiceAction(key) {
@@ -668,6 +718,7 @@ async function pollStatus() {
     // Refresh services state lazily — every 5s poll triggers this too.
     try {
       state.services = await fetchJSON('/api/services');
+      try { state.deep_health = await fetchJSON('/api/deep-health'); } catch {}
       renderServices();
     } catch {}
     if (status.current_swap_job && status.current_swap_job !== state.swap_job_id) {