feat(seats): accounts without a 5-hour limit

Anthropic is removing the 5-hour limit in stages (from 2026-10-31), and
an account without it reports the weekly window alone. Until now the pool
took such an account for an unprobed seat: always eligible, ranked after
every other, never held to the weekly cutoff, with no cap on its passes.

- The burst window is the 5-hour one, else the weekly one
  (Seats::BurstWindow). An account whose burst window is the weekly one is
  ranked by it and admitted under the 95 % cutoff with the passes in
  flight projected on it, at the measured share per pass (0.04 at xhigh,
  0.125 otherwise; REVIEW_GATES_LENS_COST_7D_PCT), and waits for the weekly
  reset when over it.
- Every OAuth account and the local login takes at most 128 passes at once,
  every driver's counted (REVIEW_GATES_OAUTH_CONCURRENCY): every run
  measured with 149 or more in flight on one account drew usage-limit
  rejections, none of the 119 with 139 or fewer.
- A 'concurrents' rejection pauses the seat for 20 s or its retry-after,
  not until a window's reset (a seat sat two hours at 10 % on one).
- Board entries, the folded foreign record and the board's view carry
  cost7d, so the drivers see each other's weekly load.
- `seats` and the log table say `no limit` in such an account's 5-hour
  column; the board's others-line names its weekly projection.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

interfaces/Crafter.Review-Seats.cppm

@@ -86,6 +86,14 @@ export namespace Crafter::Review::Seats {
     std::pair<Json, std::string> BindingWindow(const Json& windows);
     // Quantised for ranking.
     std::pair<Json, std::string> SeatUtil(const Json& windows);
+    // The window a burst of passes moves: the 5-hour one, else the weekly one.
+    // Anthropic removes the 5-hour limit in stages (from 2026-10-31), and an
+    // account without it reports no 5-hour window. nullopt for a seat with no
+    // reading.
+    std::optional<std::string> BurstWindow(const Json& windows);
+    // A window's utilisation as a report cell: `no limit` in the 5-hour column
+    // of an account without that limit.
+    std::string WindowCell(const Json& windows, std::string_view window);
     std::string ModelFamily(std::string_view model);
     bool IsFableWindow(std::string_view key);
     const Json* FableWindowOf(const Json& seat);