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/confluenceSlots.ts

@@ -1,6 +1,6 @@
 // Investor Flow — Confluence Slot Catalog (M22, slice 2)
 //
-// The 34-slot confluence inventory for the Confluence Signal Engine. Each slot is
+// The 40-slot confluence inventory for the Confluence Signal Engine. Each slot is
 // a named, independently-evaluable check whose *firing* state contributes bullish
 // or bearish evidence about a symbol's entry/exit quality.
 //
@@ -46,7 +46,7 @@ export interface ConfluenceSlot {
   explain: string;
 }
 
-/** Complete 34-slot confluence catalog in evaluation order. */
+/** Complete confluence catalog in evaluation order. */
 export const CONFLUENCE_SLOTS: ConfluenceSlot[] = [
   // ---------------------------------------------------------------- technical
   { id: 'goldenCross', name: 'Golden Cross', family: 'technical', body: 'bull', granularity: '1wk', explain: 'The 50-window average has crossed above the 200-window average, a widely-watched trend-quality marker.' },
@@ -93,6 +93,14 @@ export const CONFLUENCE_SLOTS: ConfluenceSlot[] = [
 
   // ---------------------------------------------------------------- sentiment
   { id: 'commentatorSentiment', name: 'Informed Commentator Sentiment', family: 'sentiment', body: 'bull', granularity: '1d', explain: 'Informed commentators tracked via the configured sentiment source are net-positive on the symbol in the measurement window.' },
+
+  // ----------------------------------------------------------------- corridor
+  { id: 'corridorEntryCheap', name: 'Corridor: Entry Cheap', family: 'macro', body: 'bull', granularity: '1d', explain: 'The current P/E sits in the lower third of the 1-year observable valuation corridor, indicating a relatively attractive entry point versus the symbol\'s own history.' },
+  { id: 'corridorEntryStretched', name: 'Corridor: Entry Stretched', family: 'macro', body: 'exit', granularity: '1d', explain: 'The current P/E sits in the upper third of the 1-year observable valuation corridor, indicating a stretched valuation versus the symbol\'s own history.' },
+  { id: 'corridorUpsideHigh', name: 'Corridor: Upside High', family: 'macro', body: 'bull', granularity: '1d', explain: 'Applying the 1-year median observable multiple to forward earnings implies meaningful upside from the current price.' },
+  { id: 'corridorUpsideLow', name: 'Corridor: Upside Low', family: 'macro', body: 'exit', granularity: '1d', explain: 'Applying the 1-year median observable multiple to forward earnings implies meaningful downside from the current price.' },
+  { id: 'spyCorridorCheap', name: 'SPY Corridor: Cheap', family: 'macro', body: 'bull', granularity: '1wk', explain: 'The S&P 500 forward P/E sits below its 3-year median, a market-level valuation tailwind that improves the odds for broad equity exposure.' },
+  { id: 'spyCorridorStretched', name: 'SPY Corridor: Stretched', family: 'macro', body: 'exit', granularity: '1wk', explain: 'The S&P 500 forward P/E sits at or above its 3-year median, a market-level valuation headwind that tempers the broad-equity picture.' },
 ];
 
 /** Indexed by slot id for O(1) lookup. */