fix(insights): make per-category status cards read-only so navigation never blocks on the LLM

Opening an Insights category page froze the whole UI: the per-metric
status card fired a cold, uncapped LLM fetch on mount with no client
abort, so the request hung up to the server's 60s ceiling and the
pending/resolve re-renders thrashed the tab strip and ate touch events.
Timeouts were never negatively cached, so every visit re-blocked.

Fix the class holistically:

- Bound every status GET on the client. The shared use-insight-status
  hook and the inline medication-compliance query now wrap fetch in an
  8s AbortController and stop retrying inline; navigation can no longer
  await an uncapped round-trip.

- Make the status routes read-only. On a cache miss the generator
  enqueues an out-of-band pg-boss job (insight-status-generate) and
  returns a preparing envelope; the client polls a bounded interval
  until the worker warms the cache. Models the dashboard snapshot's
  ready/preparing pattern. The queue is registered in the worker
  allQueues loop + a boss.work handler, with a guard test.

- Fix the nightly warm-pass regression: warm every supported locale
  (the client reads against the active UI locale, not the persisted
  User.locale) and warm on a cached comprehensive outcome too (its
  write still evicts the per-status caches). Add a short-TTL negative
  cache on the timeout path so a transient provider stall no longer
  makes every subsequent visit re-block or re-enqueue.

- Add loading.tsx for the insights segment + the root so any future
  RSC await streams a skeleton instead of blocking the transition.

- Stabilise the advisor regenerate callback so a status-query flip
  can't re-render the memoised tab strip mid-gesture.

New i18n key insights.assessmentPreparing across all six locales.

messages/de.json

@@ -1382,6 +1382,7 @@
     "bmiEmptyDescription": "Für den BMI wird deine Körpergröße benötigt. Hinterlege sie unter Einstellungen → Account.",
     "bmiEmptyAction": "Account-Einstellungen öffnen",
     "noAnalysisYet": "Noch keine Analyse vorhanden.",
+    "assessmentPreparing": "Einschätzung wird vorbereitet…",
     "noProviderConfigured": "Auswertung nicht verfügbar.",
     "startAnalysis": "Analyse starten",
     "refreshAnalysis": "Analyse aktualisieren",

messages/en.json

@@ -1376,6 +1376,7 @@
   },
   "insights": {
     "noAnalysisYet": "No analysis yet.",
+    "assessmentPreparing": "Preparing your assessment…",
     "emptyTitle": "Not enough data yet",
     "emptyDescription": "Insights light up once you've logged a handful of measurements. Start with weight or blood pressure.",
     "emptyAddMeasurement": "Add a measurement",

messages/es.json

@@ -1376,6 +1376,7 @@
   },
   "insights": {
     "noAnalysisYet": "Aún no hay análisis.",
+    "assessmentPreparing": "Preparando tu evaluación…",
     "emptyTitle": "Aún no hay datos suficientes",
     "emptyDescription": "Los insights aparecen en cuanto registres algunas mediciones. Empieza por peso o tensión arterial.",
     "emptyAddMeasurement": "Registrar medición",

messages/fr.json

@@ -1376,6 +1376,7 @@
   },
   "insights": {
     "noAnalysisYet": "Pas encore d’analyse.",
+    "assessmentPreparing": "Préparation de votre évaluation…",
     "emptyTitle": "Pas encore assez de données",
     "emptyDescription": "Les insights apparaissent dès que tu auras saisi quelques mesures. Commence par le poids ou la tension.",
     "emptyAddMeasurement": "Saisir une mesure",

messages/it.json

@@ -1376,6 +1376,7 @@
   },
   "insights": {
     "noAnalysisYet": "Ancora nessuna analisi.",
+    "assessmentPreparing": "Preparazione della valutazione…",
     "emptyTitle": "Dati ancora insufficienti",
     "emptyDescription": "Gli insights compaiono appena registri qualche misurazione. Inizia da peso o pressione.",
     "emptyAddMeasurement": "Registra misurazione",

messages/pl.json

@@ -1376,6 +1376,7 @@
   },
   "insights": {
     "noAnalysisYet": "Brak analizy.",
+    "assessmentPreparing": "Przygotowywanie oceny…",
     "emptyTitle": "Jeszcze za mało danych",
     "emptyDescription": "Insights pojawią się, gdy zarejestrujesz kilka pomiarów. Zacznij od wagi lub ciśnienia.",
     "emptyAddMeasurement": "Zarejestruj pomiar",