Fix FoundationModels crash, driving constraint, and disable card descriptions

- RouteDescriptionGenerator: reuse session, cap tokens at 60, greedy
  sampling, prewarm with prompt prefix, serial request queue with
  rate-limit retry and circuit breaker
- Disable AI/template descriptions on trip option cards
- GameDAGRouter: fix off-by-one in canTransition driving constraint
  (daysBetween+1) so multi-day cross-city routes aren't rejected
- CanonicalSyncService: wrap SyncStatusMonitor in #if DEBUG

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

SportsTime/Planning/Engine/GameDAGRouter.swift

@@ -654,9 +654,12 @@ enum GameDAGRouter {
         // Calculate driving hours available
         // For same-day games: enforce both time availability AND daily driving limit
         // For multi-day trips: use total available driving hours across days
+        // daysBetween counts calendar day gaps, but the traveler can drive on
+        // partial days at both ends (post-game evening + pre-game morning), so
+        // use (daysBetween + 1) for multi-day trips to avoid off-by-one rejection.
         let maxDrivingHoursAvailable = daysBetween == 0
             ? min(max(0, availableHours), constraints.maxDailyDrivingHours)
-            : Double(daysBetween) * constraints.maxDailyDrivingHours
+            : Double(daysBetween + 1) * constraints.maxDailyDrivingHours
 
         let feasible = drivingHours <= maxDrivingHoursAvailable && drivingHours <= availableHours