fix: IREN/ASTS/IRE stuck-pending + corridor feature

Fix stuck adapter_queue jobs (ASTS/IRE/IREN stuck pending forever):

1. fetchSpec early-return paths (cooldown checks) now update job status
   to 'backoff' with last_attempt set and 30s backoff_until, instead of
   returning without any status change. Prevents jobs from being
   re-processed every drain cycle indefinitely.

2. Wrap adapter.fetchOne() in 30s Promise.race timeout. A hung HTTP
   request no longer blocks the entire per-source promise chain
   forever, preventing all subsequent jobs for that source.

Also includes corridor/confluence feature, tiered quote schedules,
cache improvements, and HoldingsBookView refinements.

app/server/src/confluence/confluenceLibrary.ts

@@ -35,6 +35,8 @@ export const REDUNDANCY_GROUPS: RedundancyGroup[] = [
   { family: 'institutional', slots: ['instNetActivePositive', 'insiderInformedBuy30d', 'new13da'] },
   { family: 'macro', slots: ['ratesRegime', 'macroRegimeUp'] },
   { family: 'macro', slots: ['consumerSentimentLow', 'breadthThrust'] },
+  { family: 'macro', slots: ['corridorEntryCheap', 'corridorUpsideHigh'] },
+  { family: 'macro', slots: ['corridorEntryStretched', 'corridorUpsideLow'] },
   { family: 'seasonal', slots: ['seasonalFavorableMonth', 'winterHalfOn', 'electionCycleFavorableYear'] },
   { family: 'flows', slots: ['etfFlowPositive', 'cotPositioning'] },
 ];